Swiftcast/Quelling Strikes/Blood for blood etc. are slightly different. They are very useful skills to have, but all content CAN be beaten without them, if people don't need to be raised often, then you can hard raise just fine, and quelling isn't needed if you have very good tanks and watch your enmity. I'm not saying these skills are not highly recommended for high level play, but the point is that tank swaps are impossible without provoke, meaning that most of the time no provoke means an instant wipe, and this is the only skill where this is the case.
I don't mind what level they give it at, but level 50 would be fine, as 8-man content is not accessible until level 50, which is the where provoke is required most (before that it is only helpful in a few situation).
