Any possibility of adding an option to remove small biters at the higher evolutions?

My waves of 25k biters is something like 98% small biters with only a handful of HP, they die instantly to the flame my flamethrowers leave and I installed this mod for more of a challenge :)

Given how my UPS drops with the waves, I'd like the option to reduce the wave size, but only have biters than can take a punch included :)

Normally I'm very much a fan of more enemies instead of spongier enemies, but when performance drops to 8 FPS/UPS and the waves are still no issue for my defenses (small biters just take up UPS while posing no threat) I'd like the option to make the waves more spongee