Channeling skills mana cost

I'm surprised I cant find this info anywhere on the wiki or through googling.

Is the mana cost of a channeled spell or skill listed per second or is there another way that it needs to be calculated?

It's per use, as with other skills. Channelling skills still have a cast/attack time that determines how often they hit/apply a debuff stack/whatever - mana is spent every time that occurs.

e.g. Incinerate has a base mana cost of 9 and a cast time of 0.2 s, so you'd spend 45 mana per second.

ohhh, didnt see the cast time listed because it didnt occur to me that they had one. Thanks!