I’m gonna dive into this question taking into account that nobody in the group has the horde racial “
Arkaner Strom”.
The comp is definitly on the low side in terms of crowd control but the Demon Hunter can help a lot to balance it out. The Demon Hunter can make great use of the
Schulterstücke des Runenmeisters legendary on big trash packs that require control which will give him a second full set of Sigils by using
Metamorphose.
Another neat trick that can help teams with low crowd control is to have a couple players pick up the engineering profession to make use of the
Bombengürtel. It disorients the casts of every enemy within a small 3 yard radius, resetting their cast. You can each have 1 and it does not have or cause any diminishing returns so this alone can buy several seconds.
You can make use of every single ability to help during long AoE CC packs. Don’t forget in that comp you can have the Mage save his
Drachenodem to reset casts and the Druid use
Taifun paired up with
Ursols Vortex to restack the group after knocking them.
In a dungeon like Halls of Valor, mobs are entirely kite-able and won’t cast while going after the tank. You can have the tank run away from the pack when you are close to being out of crowd control so nothing casts (apart from the Valarjar Mystic that will still cast) on the team while they finish off the enemies safely.