600/765/930/1095.
So:
spike wave + ground spikes = dead lightning balls
rain of ice + any level fire nova or circle of flame = dead lightning balls
ooze for 8 seconds = dead lightning balls
mines = dead lightning balls
hammer slam = dead lightning balls
mist for 9 seconds = dead lightning balls
They can survive oak's surge of faith and LE's bat swarm.
The only DGs that will have any trouble with them are sedna and possibly DA.