If you are a WHM without Swiftcast, you are holding back your team at endgame

[Awake]

No it is not.
Let us think we have an lagspike from 2000ms than you have an reaktion- and movingtime about 1 second, you know what that mean? Yeah dead from Lag.
You ran out of the Zone stand still cast an Heal, than the Boss fire the Megaspell and you die 20m away from the Zone

I will turn the table around now...if you have 2000ms ping you are holding back your team at endgame.And most probably even more than a WHM not havieng Swiftcast.

I am not saying Swiftcast is not helpfull, but saying it is required in order to kill endgame content is just silly to say the least.