Token drop chance for skilling actions increased, but amount lowered for consistency.

Plague Boss Changes:

Reduced requirement for drop to 15%.
New drops: Added 200 token drop and bag of goods.
Mechanics: More consistent minion spawn mechanic: Happens at 60% of health and has timeout for ~40 seconds.
Mechanics: The Plague now does AOE Damage around him that does lifesteal
Mechanics: Minion npcs 'plague' damage heals The Plague