Chain lightning is the play, right?

What should I do next with my stones? I've stagnated on tournaments, bouncing between platinum and champions every time.

I could probably squeeze into the bottom of Champions with a few trillion more spent on health workshop/enhancement and a week or two of lab time in health. But that seems like a waste.

Currently earning around 700-750B coins per day running T9/5500-6000, and I just got my labs up to 3/3/3/3/2 with an occasional 5x3.

I'm investing heavily in the wall which has been AMAZING for farming runs... And 100% useless in tournaments.

It seems like investing in damage is the only way to progress my stone income. So I assume CL is the play with my current 800 stones?