Cobra La Honor Guard.
Five of those monsters are worth ten of any regular Cobra troop. Give them some organic long-range weaponry and they could scare the rats out of my basement.
Only Eels really.
I like to get five or six of the grunts (Cobra Troops, Vipers and B.A.T.s) but limit myself to two each of the more specialized Viper units. I'd never want the specialists to outnumber the regulars otherwise my 'army' looks a bit messy.
Eels on the other hand are a bit more diverse in their uses and I'd like at least five of them too.
__________________ Being called an 'idiot' by a fool cancels things out, I reckon...