Fantastic spell for a least one particular task:
PL'ing.
I PL a group containing my 53 warrior (boxed), my wife's 53 Warrior, a 53 Ranger and a 52 Beasty with my 61 Druid.
Worked out well in Natimbi against mobs that can do significant damage to either of the warriors. The system works like this:
1) Secondary tank pulls... say... a dark blue/white.
2) Main tank THROWS a Formed Suspension Of Slime VII at the mob to get aggro. NOTE: While the snare rarely lands, this is a very effective way to build hate, very quickly - far better than a bow, and actually even better than Bellow.
3) Once engagement starts, main tank hits Melee, Slam, Taunt and Bellow. If you're really worried about not getting aggro, make him hit Charge too.
4) The druid snares immediately after the main tank engages, but waits for the mob to get down in health a bit - use your discretion here to know when so that the group you are PL'ing gets XP - then touches off this bad boy.
Dead mob, heal the main tank, med up while the puller goes to get another victim. Lather, rinse, repeat. The Fierce Cragwalker dropped like a rock to this technique twice last night.