well, I just think you don't want to believe how good of a hunter/cleaner wolf is supposed to be, obviously, if they send just him, he is good enough to be enough, so good that they don't believe he will fail at all, so good that sending another with him would be overdoing it. I mean, obviously they have absolutely full confidence in him, and him failing would be a shock, thats how good he is supposed to be.
I bet thats retarded too? Well thats obviously the way it is, if Wolf fails, he is supposed to blow his nuke like every predator is supposed to, meaning there shouldnt be a need for any more, send one, if he 'fails' he blows the place, takes care of everything, they send one to make sure the threat was completely elminated, there is no logical need for any more then one.
the weapons of a predator have always been changed/modified etc. with every film, dual plasma casters is just another interesting weapon idea that works, but a predator hunting solo is a great defining thing for their character, they hunt alone, they aren't pack hunters, they don't try to rely on others to help them survive, thats how predators work.
and by the way, the predalien molting into a queen is not something I'm fond of, don't generalise every one of us as 'you people'
so in conclusion, one is plenty, because obviously whoever sends wolf thinks he can handle it, and by nature, predators are solo hunters, so they send their best, Wolf, his victory is not nevessarily garenteed, but thats what the nuke attached to his wrist is for...