I use ZOE - but only on my AA max loadout. I find it can be utterly devastating on divebombing ESFs. You wait until they are taking a direct line towards you - then pop ZOE and unleash both bursters. The closer they get - the more damage they take and even if they do a Kamikaze - they rarely make it close enough. The only issue I usually have is against Reavers packing an M30. Also useful to inflict damage on overconfident Gals and Libs - although Bursters cause so little damage that it is barely a deterrent unless there are others burster maxes or skyguards in the area. Outside that specific circumstance - ZOE is pretty useless. I run with Max Charge on both my AV and AI loadouts.