I would think the wind shear could go just about anywhere, as it's free to use whenever since it is off the GCD.

I'm not terribly familiar with how you're using /click, but maybe this will help.
You can add target specifications to a /castsequence just like you can add to a /cast macro.

example(my clones entire EM+LvB macro):

#showtooltip elemental mastery
/assist [mod:ctrl,nomod:alt,nomod:shift] Taj; [mod:ctrl,mod:alt,nomod:shift] Maj; [mod:ctrl,mod:shift,nomod:alt] Haj
/cast [target=focus,exists,nodead][] furious gladiator's mail gauntlets
/cast [target=arena3] wind shear
/cast elemental mastery
/castsequence [target=focus,exists,nodead][] reset=8 flame shock,lava burst,chain lightning

as you can see, you can add targeting information to a /castsequence as well... hopefully that will help as well.