All might is 25.75 Gigatons, Ueki can fight Anon who stomp baseline 6-C like Robert. I guess that All might still have AP advantage, but the gap still not too far. Ueki can still fight back.
On CQC alone, pretty sure that All might has more skills. But Ueki can still use the same plan when he fought with Baron who be the expert on CQC, by make him fall off balance and attack with his sacred weapons. Ueki can also stay back and keep distance from All Might with Raika or Seiku, which he can also speed amp by enhance his heaven power to it.
On ranged attack, Ueki has more advantage, with variety of his sacred weapons and can also release several sacred weapons in same time.
Ueki can also trap All might with Guliver, which make Ueki can strike him from outside while All Might can't be strike back.
Ueki is also be observant. He should be able to see through some of All Might's fighting habit like when he noticed Marilyn's fighting habit. So he should see some of All Might and predict some attack from him too.
Ueki also has Maoh, which is the most powerful attack that can take down Anon in one-shot. I'm not sure that it can one-shot All Might or not, but at least it should give him serious injuries if if hit.
since its speed equal ueki can blitz with raika and i think his level 2 gonna works on almight because almight need to transform from his normal form to muscle form so almight cant go full melee once ueki start spamming lvl 2