Remember that Zombie's death-trade only happens if they're killed by an attack. I still use Palp lead, so my strategy is to shock/DoT/burn everyone, whittle them down to the red, and then hammer basics on Zombie until they all die on their own. Palp's 5% health drain helps to not overshoot (triggering a bunch of TM gain and plague bonanza -- it still grinds my gears that accidentally killing an enemy can be the losing move, but that ship has clearly sailed).
Not as good a strategy when there's an Acolyte with high tenacity that keeps reviving them on her basic, but Acolyte teams are usually easier than Talia teams for whatever reason.