Vatano, what lvl/*/gear is your palps? That your issue is potency warns me that it may be a bit low. I think an effective chirpatine usually has the opposite issue of palps killing the B1 instead of zapping it.
Tips: lead with sthan taunt. This should get palps enough TM to zap the other B1s before the tank goes off. Don't taunt with Sun Fac until after all the B1s are shocked...probably once sthan is 50% health or lower. That way Sun Fac doesn't lose his taunt.
FWIW, potency on my palps is 86%. It's a good thing.