by Hulkling » Wed Jul 21, 2010 12:20 pm
The added bonus from Heal Amount and Spell Damage are based on each spell's cast time and recast. The higher the recast and cast time, the more beneficial Heal Amount and Spell Damage is. Weapon procs, for example, are instant and have no recast, so they will get very little benefit.
Clairvoyance is a chance to get back some mana after you cast a spell. It was formulated a bit too low, and thats why you'll see this stat much higher than the other 2.
(for the record, these are considered Mod 3's)