On high movement service and supremacy got the Same utility, so you'll take the one with the highest damage output, and that service in that case.
@Xelnath: yeah, that seems to be its only strength, but its the question if it will be worth using if for this. And @ wrathguard, like i already said, it's weaker than felguard, and thats an about 5k dps los with t13h gear, because its like you just skipped the tier and playing without a grimoire. Although, those 5k came from simcraft, so ist could be wrong, but wrathguards damage was tested ingame