No, they always go to the front.
obligatory battlebots 5 comment
No AIs attack the back.
I think SM is a pretty cool guy, eh builds unicycle-bots and doesn't afraid of anything
You got my vote for RA2 Wizard. Always and forever.
get all the Irons on one or two pistons.
Out of curiousity, why aren't you using any air? The advantage of having pistons is so that they can apply additional force to a hit. You may run into the trinity glitch if you add air but if the pistons aren't going to fire, I would just get rid of them.