Flame Infusion: Places a buff on the shaman that lasts 15 seconds and causes each tick of flame shock to cause a fire nova to erupt from the shaman.
-30 sec cooldown
This would still allow us to spread it the same way but would make it a lot more passive aoe than the clunky weave it into your melee dps rotation. Also it would be easier to use in my opinion because it would be reliant on your position rather than the mobs. The cooldown is put into place to make sure it doesnt become a staple of single target dps.
Flame Eruption: Places a Buff on the shaman that lasts 15seconds that causes melee strikes against targets with your flame shock to erupt with fire.
Something along those line would be pretty sweet and allow enhancement shamans to more easily incorporate aoe dps.