MynameJeff
It's nice that you chose Madara and Gilgamesh. It would be cool to see the MC use their abilities. But I think it would be better if you chose between the other two choices (Starfire and Nightwing). Not only does he have the One For All (OFA) which makes him OP (looking at Almight's feats plus his strength, speed etc. I stopped reading the manga and watching the anime at when Allmight beat AFO but I did read a fanfic that talked about how the OFA user can access quirks of past OFA users giving Midoriya more abilities at his disposal than just enhancing himself with OFA. I don't know if it's true but đ€·), but if he gets Madara or Gilgamesh template, he'll be too OOP way too much too fast. For the worlds of Naruto and Fate, they have great abilities, but the variety of martial arts/taijutsu is lacking compared to our world or the world of DC that has even more (I mean, why would they need that many Taijutsu styles when they have the mystical chakra. It's how they are. They don't need cars to travel when they're faster than the cars). He has magic right now and with the OFA, he'd need something like martial arts to help condition his body for the OFA and as a close range play incase the opponents get too close and there's no time for magic. which is why choosing between the last two who are great martial artists is the best option. Let's look at the characters themselves. With Madara, he'll be able to eventually do anything as long as he trains for it and experiments with it (chakra can do about anything from manipulating natural forces to creating life and destroying etc. with enough work put in) and then there's the abilities Madara already possesses. With Gilgamesh, he can do anything he wants (with the GOB that has every treasure he has collected and more, he's untouchable if he wants and he doesn't have the ego and pride of the original Gilgamesh holding him back). These two are practically last choice options in my opinion. I suggest Nightwing. đ(Or Starfire)đ
his third template really depends on how long it'll take to get Izuku up to 50% because he's only got 9ish years before infinity war. (if we're following loose mcu+ timelines that is) I want to say Starfire because I love that character but Gilgamesh might be the more economical option as he's incredibly powerful even at half power.
I would say that the third character should be gilgamesh, hear me out first. others while good don't make mc a literal demigod and give him power to restrain God's (enkidu)and gate of Babylon has Ea, along with most noble phantasm in the history. madara would be good choice in short term but in long run gilgamesh is better. anyway keep it up with the amazing chapter author san. and can you please make mc more neutral instead of a goody two shoe he is right now.
Madara would be a very wise choice, for starters his sharringans and rinneganes abilities, 6 paths form, Kyubi (can be summoned and controlled, can control something equivalent), has a good cqc and sword experience, ALL OF HIS JUTSUS, chakra, and most importantly the cloning jutsu (specially the wood one) that would allow him to be facing facing different situations at the same time while different template. For Nightwing, he has a great experience in martial arts, some technology knowledge, but again... Would mc really need martial arts if he already have the fighting experience and absolute power? I mean Hulk, the Asgardians, Doctor Strange, Iron man, Logan, Apocalypse, Deadpool... Never or barely use martial arts, they just use their own experience, superpower or absolute strength. Only the likes Black Widow and Dardevil would use those techniques because they are not strong on the level of a superhuman (like Captain America). About technology, is it really worth it compared to what the SHIELD and Stark industry possess? For Starfire, I don't really know. Gilgamesh : superhuman body, can summon a large variety of weapons with great powers but otherwise that's it. So I recommend Madara in first place, Gilgamesh in second, Starfire third, Nightwing last.
If any of you think Gilgamesh and Madara are too op, think about the celestials. They could most probably defeat Gilgamesh...And I think it could be a good way of introducing celestials...And you could slow the synchronization so that he doesn't become too op too fast...And if you think he's too strong, think about Rimuru tempest at his final form...
I think it would be best if either Nightwing or Madara is chosen due to the fact the mc needs to be well rounded in combat because there will be a time and place where strength from one for all and long range attacks from magic may not be enough to handle certain foes in close range. Nightwing and Madara both have experience with a wide range of foes and are quite adoptive in combat type situations. Madara is able to fight against an army with taijutsu without wasting stamina and chakra because he experienced fighting from an earlier age due to the constant war against other clans for resources in which even young children must participate. Many of his brothers died in combat and he survives with great effort. Nightwing was raised in an environment where fighting crime was the norm to him. He was one of Batman's protégés therefore learning a wide range of skills needed in place where crime runs rampant.
Honestly I would say Madara so he could cast a genjutsu or Summon shadow clones to act as his other persona's otherwise people like Nick Fury and others will quickly find that those hero's are all the same person really quickly. It would also give him a significant increase to his defensive/offensive capabilities along the utility of his other skills such as high speed movement, genjutsu, hedge, and his combat experience. That said his power would heavily increase depending on what version he is able to unlock would it be the original first shinobi war, perhaps the impure world Madura who has infinite chakra and a self regenerating body or ten tail Madara who has the rinne shaningan with truth seeking orbs.