The title pretty much says it all.
I find that when dealing with most groups of mobs that require AoE (i.e. the dancer groups before Moroes in KZ) I inevitably pull aggro and die very quickly. Even if I wait 10 or so seconds and try to swoop in with multiple seeds for the kill, if everything doesn't die I end up having to drain tank and pray for life as everyone else beats the remainder down. If I use Rain of Fire somewhat earlier my damage output dies and I still pull aggro often.
Is there a better way to do this?