Feral invocation from mana SPENT to mana USED

Feral invocation making spirit of animals appear to use attacks, while not stopping channeling is REALLY cool.

However, as it is right now, it only works via mana you SPEND. So using skills. Not Mana that is consumed by skill effects. For example, it does not gain energy fron oracle's pasive "damage from mana", it does not work for Mana flare, as that has the keyword "consume" mana instead of spend it.

I think it would be cool to allow any use of mana to support feral invocation, given that it isn't an automatic trigger anyways.