Need help whit build for Bower

i choice for full str and i dont know what mastery 's i need to use light fire and pachon ? and what lvl they need to be i though if i do

Pachon :90
Fire :90
Lightning:90
and something else but dont know if u have a better build tell me plz




Thnx

90 fire, 90 pacheon, force 90, cold 30
that build roxx trust me ;)