here the best tip for f2p-p2w

F2p do whatever you want . cause ur gonna get owned anyways in the future. early game isnt bad but when u get to lvl 80-85 even if u focused only on power you will be matched with peoples that have spent thousands $ . So personaly id say go for ninjas and collect as many you can. so at least you can have fun trying things while getting pwnd at every corners.

P2w do whatever you want . you win.