GMB + something -deffo would be crazy. -sheydos too but he wasn't the problem tbf

M80 is the APEKs of NA. difference is apeks players all got onto t1

Look into DDK's videos for the mental game which is a big part once you get to immo+, as well as aplox's podcasts, even styko's cs videos have a lot of advice for how to develop as a future pro player.
In terms of hiring a coach, go on metafy you can find a lot of actual pro players and coaches who do personal coaching, my recommendation would be Roy Strong Legs. He played on t2, coached and is very into coaching at a high level.

NA
Duelist: Katarina
Initiator: Bob
Smokes: Katsumi
Chamber: MeL (IGL)
Flex: Sarah

EMEA
Duelist: Juliano
Initiator:cinnamon (IGL)
Smokes: ness
Chamber: Smurfette
Flex:Mary