If u stop playing rumble, then all you did was for nothing... Honestly, u can look and say, im a better pvper than when i started at 0 rumble. I didnt improve too much, but just bits here and there, ull be better pvp player. I encourage u to keep playing rumble, but for different reasons now than grimoire. If u decided to go with warlock, i suggest void walker, the ram, primary of choice ure most comfortable with, matador, deviant gravity A or btrd or something similar of power and stability and range hmg. I done my 100 out of 300 or so wins, using red death, against thorn tlw and hawks...