If DS is in a click sequence...

You could change the priority on your toons.
So one casts it earlier and another later.

But each is doing the click, which gets you staggered castings of DS.
Without any management on your part.

The toss up for this... we generally build click for maximum damage.
If you move the abilities about, you'll put some lower dps moves ahead of higher dps moves.
So it becomes a juggling game, DS utility vs DPS efficiency.
There will be a balance somewhere.