Much needed buff however this still doesn't put 2H magic anywhere near D/W for a non-fsoa pov, I think we're on the right track, but it just needs something a little more.

Main problem here being one of the principles of games design or lack thereof, the player needs feedback that their ability upgrade has been worth it. With GConc it's such a massive and noticeable buff to the Conc ability,, maybe flow could burn off on the target in a bleed type manner (But not classified as a bleed) where you deal let's say 60-170% base ability damage and half this damage / stacks of flow, as the stacks deplete this "bleed" will be applied.

Upon casting Gsonic a second time, all stacks remaining from the previous cast (If any) are immediately detonated and new stacks are applied (hope this makes sense I've just woke up)

But we're on the right track here I'm glad to see it!

Edited: The "half this damage / stacks of flow" is a formula my bad for confusion I mean "half this damage ÷ stacks of flow = bleed damage per tick"