The bug was reported wrong, you guys should know that to get a fix in you have to report the opposite effect of the bug so it gets the intended fixed.
It should have been reported as Dark Stalker is improving movement speed by 200%..
The numbers thing is always going to be there, but it’s more down to player skill and there are ways through ability choice to configure a group to be stronger vs. large groups of people. - BRAIN WHEELER - 2012 - LOL