Hello, thank for the reply.
I don't think speed engine is gonna speed it up, because GMS2 itself is capping it to a max.
Currently 1.6 is my last update for this game play system. I am working on to remake the whole game.
The V2.0 will have a separate pool for that. The newer version will be more RPG like. I will shortly make a dev blog for updated of the newer version. Check in once in a while if you're interested.
I'll speed up the mana regen for now, to keep it interesting.
Thank for giving me feedback!