suggestion ditch, or massively nerf the +2.5% stat per kill spells. i got lucky on a run, and got the control, magic and speed ones and quickly became an unstoppable deathgod. im currently on level 8623, with no signs of it ever slowing down but rather getting faster and faster, made worse by the fact that i now have 8 +2.5% per kill spells, stacking their effects. if it ever slows down, ill just pop the "+20% of health to stat" spells on and bulldoze through some more.