bapcja wrote:psionic storm will always drain 10% of your maximum mana in addition to its flat cost, so putting 1 point into it wont change much other than gimping damage. its also not good at healing spiky damage, because 10% is not much and you risk getting killed when you stop to cast it
Yes of course, but by using another skill as the main skill you're not forced to keep draining your mana 10%, you can use it when you want it (when you feel ok to afford the mana) or when you want to heal.
As a heal, I'd be more likely to use this when I'm healing out of combat tbh, or when I'm mopping up a few not-very-dangerous monsters.
When PS is the main/only skill you have no alternative but to use it all the time.