ToME: the Tales of Maj'Eyal

Arcane/Shadow feed are particularly dull talents. A single point is enough to allow resting to recover mana (and make manasurge runes more useful); going any further isn't incredibly attractive. Plus, mana regen egos are fairly common, and one piece of mana regen equipment is worth around 1.5 points in Arcane/Shadow Feed.

I think these skills should instead give considerably more mana regeneration (perhaps up to 5 mana per turn?) at the cost of draining a fractional equivalent of stamina. I think it fits more with the "Feed" idea, and goes some length to removing the necessity of a manasurge rune. Of course, Manasurge shouldn't combo with this effect (you'd end up with something like 50 mana/turn).

I quite like them myself - they're not overpowered, have a clear use for the class, and can still be worth investing fully in to maximise mana regeneration. They're certainly better than the old activated feed.