ForgottenLife
If the mc acquires six path mode than he should be able to heal himself. after all hagoromo revived naruto & sasuke after they got killed by madara. Naruto also created a new eye for kakashi and eyes too have chakra pathways if naruto could create them without medical knowledge then izuna should be able to heal or create new ones for himself. He can also use izanagi on himself to remove the damage than create a new eye with six path yang release or his regeneration should also be able to regenerate his eye or his chakra pathways. After all madara had said that hashirama could regenerate limbs his regeneration is on par with hashirama's with his wish & the limbs too have pathways if they regenerate new pathways are created. It is idiotic of the mc to worry so much but if the author nerfs him then it should be another matter all together.
Ah ... The solution is easy ... Ixuna just needs to gather the nine tailed beasts's chakra , and a small part of the demonic statue of the outer path , then fuse them together .... Thid can create a sort of mini ten tails ... Then , he can completely absorb its power into his body and soul , and become ten tails jinchuriki (low level) ... This will allow his body regeneration to become as fast as madara when he was in this state , and will strengthen his body to unimaginable levels ... It will also allow him to awaken rinnegan and possible rinne-sharingan , and he will also get access into the ability of truth seeking balls (a small number of very small balls .., they can increase in number and size with mastery and power) .... Also , he wil have an immortal body , and it will be able to sithstand the power that his currenlty-mortal body cannot ...