As insane as Todo was during his Schitzo-meltdown with Takada-chan...Yuji was even more insane.
Todo's schitzophrenia is wild, but let's look at this from Yuji's perspective:
Yuji just saw Todo cut his own arm off, the key component to Boogie Woogie, the cursed technique that was allowing the duo to get the jump on Mahito.
Yuji then watches Todo get hit by a direct black flash,
which leads to Todo vomiting up his body weight in blood. By all means, Todo is dead.
Yet, what happens?
Todo touches the guy you aren't supposed to touch, of his own volition,
Yuji swaps in, no surprise on his face. Hell, he's mid-swing as the teleport is happening...
...and he lands a black flash.
So, in the span of seconds, Yuji saw Todo on death's door with 1 arm, thought "Todo's gonna use Boogie Woogie", stopped chasing after Mahito, calmed himself down to such a high extent to enhance his cursed energy, then landed a move that is literally impossible to manually activate, solely because he believed in the ability of a one-armed man with ruptured organs to clap.
Between the two, it's a genuine tossup on who was more insane in this fight.