I use reset=target for my shamans. As far as I know the fall thru spell Lightning bolt still continues to cast until FS and LvB come off cooldown. Isn't that the same as what your reset=focustarget does? Is that not what you are trying to achieve.

As far as I know reset=combat is only for when you don't want to alter your castsequence for anything while you are in combat like a pallies tanking macro. It doesn't need to deviate.