Quote Originally Posted by TelosNox View Post
You just can use a macro that uses Impact first and then Jolt. If Impact is ready it will be used, otherwise it uses Jolt.

Only tradeoff: In a few cases it happens, that Impact Ready runs out during casting time, so one cast gets lost.
The other issue is that macros don't queue so you may loose some cast speed. It doesn't seem like much but since it's on your most frequent spell it adds up quickly.