Dealing with Kephess AND the Pulsar droids is a little much bud. =/
Nothing worse than being penalized for having too much DPS. (kinda like on Toth and Zorn as well) Kill them too fast and the entire encounter crams different phases together making it damn near impossible to beat.
But back on topic. We've seen that happen as well. We just Off tank the 4th till he blows. Not a huge deal but a headache.