are on a team
Z are on the other
A sees Z and gets the first strike Z dies
Y sees B and gets the first strike B dies
X and Y see A and C all at the same time X and Y both attack A wasting time since one could attack C A dies while they are doing so C hits them both.
Team 1 wins with only c left alive.
The video was very little to do with hox, but all to do with the dps that is done by everyone. There is no player that can survive 6000 dps per second of the opening salvo of a furyshot. And that's just one build, there are equally op combos everyone can use but that would be one of the most effect to kill another player.
This is why no form of pvp can ever work in ddo. To do pvp you would have to gut every class make them all the same except in name, and make sure damage output is never more than total hp possible in each hit. This would be a ground up rewrite.