@gogito: He can but the duo can charge up more nature with Naruto during time period or prep more attacks when he returns. It's possible that he can avoid them but they're attacks DC from the explosions is sure to make Jigen get caught up in it and TB Susanoo would be faster than Adult Sasuke's PS. Except having more is the entire basis on why people say that the adult duo is faster and here Naruto would have a boost that's greater than 50% Kurama he got as a adult since the Ashura avatar boost is equal to that same 50% Kurama + the 8 other bijuus, so saying that these forms won't be faster because they are more powerful would also apply to the adult duos (also we know the bijuus chakra increases stats for instance look at jinchurikis in bijuu forms vs their base forms and the same is true for nature energy boosting a persons stats as seen with curse mark and sage mode). If people agree that Adult Naruto is significantly faster with another half of kurama then he should at bare minimum be even faster with a boost that is even greater than 50% Kurama, so he should be significantly faster with ashura avatar form then his adult kurama avatar form. He might be able to avoid all of their attacks but in round 1 it won't be forever since he has a time limit and this duo would have way more chakra and energy + stronger defenses so they could outlast him. He could teleport but by time he's gone the duo in round 2 and even round 1 can recharge (assuming they are out of their attacks range to not get blown out of their avatars by their own jutsu since now they aren't aiming at each other).
One of them can stall while the other is charging up, and both their defenses are far stronger in this form (including Naruto who has TSB's defense here) so I doubt he'd break through. Naruto's avatar is far stronger here than it was in the Jigen fight so a head but is not breaking it and even assuming he can pierce through Naruto still has his TSB defense inside to vape Jigen on contact.
It's still possible especially in round 1 where he still has a time limit. That could be true but in round 1 he'll eventually go down to less than 10% even assuming he dodges all their attacks. I disagree, if he saw the need to use rods to block a regular sword from Sasuke then he sure as hell isn't block a TB susanoo sword or a majestic attire sword from the duo, furthermore he wouldn't even need to dodge Sasuke's PS sword if he could have tanked it. That majestic attire susanoo would again be just equal to a 100% avatar from either duo since both of the duo were at 50% or less in the fight and both are equal, and Momo didn't get hit directly he was in the head of golem and his golem was sliced in half from waist, the shockwave from that swing stunned Momo (pretty much KO'ed or unable to fight before those guys powered him up) even though Momo was in the golems head and not in the waist, Momo thought it was best to avoid shurikens and kunais and sword strikes from Sasuke and boruto so I doubt someone with durability to tank a susanoo swing would need to do this, also Jigen doesn't really have durability feats at all so his durability could be lower then there's while his power is above Momo and the adult duos (Jigen is just a incomplete vessel afterall). Fair enough but their DC will eventually catch him and in round 1 they would outlast him to where he goes to 10% at which point the duo wins.
I honestly can't since his avatar is equal to 50% kurama + the other bijuus and nature energy is shown significantly increase durability (like sage mode Naruto who can tank falling onto spikes and other stuff that'd kill him except here he has the entire planet's nature energy at his disposal amping him and his avatar to a far greater degree). Unless Jigen has six paths power or sage power (which he doesn't) then he's not breaking the TSB's, saying he's strong and negs them is like me saying Kaguya is strong so she would ignore kamui hax and neg Obito/ DMS Kakashi's kamui intangibility even though we see what happens to her against kamui intangibility despite her strength and speed and hax(raw strength doesn't always overcome hax in Naruto). Kind of doubt he'll pin down the avatar especially when it's much stronger than the avatar he faced before and the avatars can also stay airborne if they want to avoid getting pinned to the ground and they can fuse while airborne if needed. Even if he can spam endless rods (tho the OP states he's only not going to break a part here, which only takes away his time limit and crumbling body but leaves him the same as round 1) the team can spam their jutsus around Jigen and he'll end up getting caught in one of the blasts sooner or later while his rods would get blown away or vaporized from the explosions (considering Naruto in chapter 37 neutralized Jigen's rods with a Odama rasengan), if he jumps to another dimension then the duo can charge up with more nature energy or even more chakra and jutsus until he comes back. I doubt only one of them would be left since this duo has way more energy/ stamina / chakra and should have better stats in their avatar forms. He did have killer intent tho, in chapter 39 he said it was "the end their rope" (implying it's the end of their life) when the duo were down before he cracked his vessel and when he going to seal Naruto due to it requiring to much effort to kill him he said he was going to kill Sasuke (even though he was weakened here), even in V1 Karma he said the one he should "eliminate" first is Sasuke, confirming his killer intent towards the duo in the fight.
Eliminate would mean to get rid of or kill if he wanted to KO them then he would used different wording but all evidence points to him having killer intent in the fight. So the duo did fight a killer intent Jigen.
Agreed it would definitely be really powerful. IMO I see the duo in these forms pressuring him back and then fusing in mid air (since Naruto and Sasuke both fused with their clones + nature energy and the bijuus (their chakra) respectively in mid air). I don't see it rods really working affectively against a avatar this strong especially in mid air, but even then Naruto could use his rasengans and TBB like he did in chapter 37 to counter the rods again.
Against Madara it was different since against 1 eyed Madara it was just them battling and not avatars since the duo were getting the edge in the fight and just needed to touch him to win (using susanoo and avatars would be pointless, especailly due to immortality and convinently having one shot seals that would work). Against 2 eyed Madara the Sasuke was forced to catch up to Madara with PS flight while Naruto had to stay on the ground to deal with the cut up meteors and limbos so they couldn't do it here, against 3 eyed both were cornered and trapped and Madara was later transformed so neither could use it in that situation. Against Kaguya Sasuke's PS was always getting one shot and the duo were being separated and even Naruto's chakra arms were useless against Kaguya and again they didn't need to kill Kaguya (not that they even had the means to kill her since she's immortal) they just needed to 1 touch and seal her like Madara. Against Jigen I'm not really sure why they didn't try, probably cause of their confidence at the start of the battle combined with some plot nerfing them somewhat in the fight. Against Momo and Juubito they still fused and in this fight they start off with their avatars so I see no reason why they wouldn't fuse here given the chance and who knows maybe they'll fuse avatars in the new chapter. Together Kaguya and Madara would definitely be above Isshiki, individually Kaguya would IMO definitely be above Isshiki, however Madara and Isshiki should be closer IMO powerwise (Isshiki physcially stronger while Madara has more chakra and should have more DC) but I would say Madara due to all his haxes and versatility would win in a good fight, but my opinion may change in the upcoming chapters about both Kaguya and Madara (tho hax wise I'd still give it to them unless Isshiki uses some more OP hax). I don't think they didn't fuse because they were stronger if that's what you mean, it's because in both those fights they needed seals to win since both opponents were immortal and they already have one shot seals which they lack here in these forms, for instance look at Obito and Momoshiki fight they were still fusing against strong opponents in those fights. He might just be able to damage them but I think they'd fuse before that happens, especially in mid air and they should have the means to defend against attacks from Jigen. Agreed, I think Jigen can have a chance at winning round 2 if he's able to play really smart but IMO I see the duo coming out on top more times than not.
Agreed, if they do that right off the bat they'd waste a lot of chakra (even assuming they stay out of range of the blast and don't get blown out their avatars severely injured). However the duo is smart and Sasuke's always been analytical and tends to analyze a persons abilities before trying to attack a opponent, same with Naruto to a degree so I doubt they'd carelessly use their strongest jutsus with all their chakra right off the bat, but if they do then yeah they'd probably exhaust their chakra and give Isshiki the win unless they somehow still have power left in their avatars after that attack (assuming they aren't caught in the blast) and manage to outlast him.