Second place, could possibly go to the Fire Oni, but id say the 1000 armed budda would kill him.
"Flame bolt"? Its called a 'Fire Ball'. Sorry for being so literal, but i couldn't help it, either way, the fire does not do as much damage as the lightning, if it caused more damage then both Sakurai and Cherrys suits would have broken down, just like Izumi's did after just running away from the Oni Boss, he didnt even get hit and look what happened to him.He can make an extremely big destructive flame bolt, and it seems that the damage is more than the lightning does
His teleportation was a very useful 'weapon' against the two, but Sakurai was holding back due to the state his organs are in, so techically it was only one psychic.
Overally, if i had to pit the Fire Oni, and the 1000 Armed Buddah against eachother, id still go for the Buddah.