#1 - March 25, 2012, 10:31 p.m.
1) It's a hit dependent heal. If you cast it on a mob and miss, the entire stack disappears. But sometimes the damage portion misses (hit roll for each tick?) and does jump.
2) If the stack is on a mob and it dies, it disappears. Hopefully this will force a next bounce.
3) Does not jump mob -> mob or player -> player.
4) Does jump to NPCs such as the Lashtail Hatchling.