5 hrs is a bit much, but is it really that bad if it takes them 30-45 mins to kill?With the target lock in the game i definitly dont want to see a group holding aggy for 5 hrs slowly hammering away at it when my clan can kill in under 10 minutes so either remove lock or keep the enrage personally i like enrage anyways even without target lock.
I know for sure it took us longer than that on our first few attempts.