I agree that it doesn’t need to be complicated but funcom always likes to make us work for it.
Stamina spells sound like a good idea.
Quick casting basic spells is great too, as long as its short and simple but not instantaneous.

Playing with 40% corruption is easy enough with max grit and vit and the right food and elixers.
The rest of your attributes need to be spent on carrying stuff or thralls. So there is no real power to be had by sacrificing all that health and stamina. Extra attribute points would feel like a reward for the sacrifice.

I’m just kicking around ideas, I’ve got no idea if this would fix the imbalance that sorcery is or over do it making it too powerful.