Don't listen to everyone, pick GM Sub. Slide your way past the zoning. Put a safe clone and 50/50 him to death.
But more seriously, block his zoning then walk or run in a little. Block his zoning and now you're in the range where one wrong read is bad for both you. He could try to zone you but he'd be negative and if punishable you could reversal slide or EX slide through his spirit moves if you prefer. Spirit charge is like -16 so you can for sure punish that same with rising karma. I don't know how punishable the overhead is though. Slide > all his zoning at mid range except spirit charage. Spirit Charge > Slide. BUT Spirit Charge is PUNISHABLE by slide. So that's if you're playing the reads game.
If you get him to the corner. I'm not even joking punish his zoning hard and 50/50 him to death. Make sure you ONLY use clone setups that are safe. You don't need to be going hard everytime because EX bf2 will push you full screen away from Kenshi and you need to work again. It's all about dat oki.
That's my advice, it's not very well thoughtout and some of it's probably not totally correct if you argue petty semantics or whatever. But it will get you on the right path if you want to use GM sub for sure.
Live by the klone, die by the klone.