Any good WindBreaker builds?

The idea is to push mobs into a corner, then Rain the HELL out of them. Not Push, Rain, Push, Rain. You don't just push monsters away and spam an attack, you close the gap after pushing. Pushing isn't for distance, it's for mob stacking.

If you're training at FoG, you're pushing things into the corner and spamming Storm Breath, not Arrow Rain. If you can pin pomegranate into a corner with Storm Breath, just use Storm Breath. It has further range than Arrow Rain and won't aggro things behind you, why bother wasting time and risk taking pomegranate loads more damage that could potentially kill you by closing even more distance? The places to train with Arrow Rain, Storm Breath is probably the last thing you want to do there.