[Feb16 Update] Hero AI Improvements

From first looks, updates to some of the already-key skills in hero builds:

- Mistrust: AI uses it on targets that don't have offensive spells (healer monks & restoration ritualists).
- Heroes will use Signet of Ghostly Might and/or Armor of Unfeeling soon after summoning any spirits, rather than waiting until they have finished raising them all.
- Glyph of Lesser Energy when activated only, the AI prioritizes skills of high cost over lower ones. Monks ignore 5 energy spells except when an ally is near-death.
- Heroes do not use Panic to its full potential: when it recharges, they do not cast it on a second foe, but wait for the hex to expire on the original target.
- Ancestors' Rage is used on characters who are within range of more than one foe and taking damage. Unlike most damaging skills which target allies, heroes will not use Ancestors' Rage while set to "Avoid Combat".
- Heroes will not reapply an enchantment or hex before it expires, even if doing so would be advantageous. Examples: 1) Necromancers will not recast Aura of the Lich to create more minions if the enchantment is still active. 2) Necromancers will not recast Masochism while the enchantment is still active, and miss the +2 Soul Reaping boost opportunity to boost the spell itself, lovering the sacrifice cost.

Skills that might potentially benefit a lot from this update, but aren't currently meta:

- Judge's Intervention is used differently than Divine Intervention: heroes will frequently spam it while out of combat (like Death Nova), but rarely use it during combat, either to save an ally's life or deal damage. In particular, they seem less likely to target minions, which might otherwise be the most effective recipients of the skill.
- Wastrel's Worry and Wastrel's Demise are spammed constantly over other skills and can drain energy rapidly.