Gonad - As many as he needs to before he passes out from exhaustion. Likely thousands.

Donny - No limit. He could start a nuclear war and use clandestine tactics and political manipulation to remain untouchable. In a straight fight? About 800 people in a forest over the course of three months, slightly superior to the record of the Finnish sniper Simo Hayha. If allowed access to prep, he could kill tens of thousands.

Kull - 30.

Zande - 37.

Auz - Tens of thousands.

Catskull - A few hundred.

The Magna Pater - Limitless. Its current Earthly kill count is in the hundreds of thousands.

Tom - Seven.