Geniuses kicking ass and taking names

Genius mage boy who has the ability to see mana, which is supposed to be invisible. He's pretty emotionless but still wants to avenge the other homeless kids he lived with who died because a gang war in the slums they live in. Learning new emotions also improves his magic abilities go figure.

Mc is the kind of genius that learns quickly and can quickly master any skill or task he takes on. He wasn't the hero trying to save the world just a regular party member. But he regresses AND reincarnates when he and his party are wiped out. Decides to use his genius in his new life to gain power and influence and stop the war that killed him and his friends.

Slop slop slop. Dropped.