With a force like that, I would drop at least 2 piglets for additional Gremlins. (That would get you 3 Gremlins.)
Mashimartian has a good idea, too.
If you go with Dumb Luck's suggestion (which would be a variation of the Alpha Stank trick), I'd change the list to get 4 Mosquitoes.
In any case, I've found the best thing to do with my Gremlins is to spam down as many of whatever my main 'troop type' is going to be as I can. (Don't forget the Taxidermist can make Stuffed Piglets out of Corpse Counters...)
Whenever I've tried to do a generalist approach with them, I've gotten stomped.
Whatever you do, don't get discouraged with them quickly. The Gremlins are tough to play, but once you find a play style with them that works for you, they're loads of fun.
(Actually, they're a lot of fun anyway, so long as you're willing to get silly with them. I drive my opponents nuts with bad accents and silly voices whenever I play my Gremlins.) :laugh: