Our war machines don’t have it easy, that’s true.
Allies can be useful, but the metric of it all doesn’t make it easy. An allied contingent needs to follow all the normal army composition rules, so you need a general, 25% core and at least one non-character unit. Even a naked Aspiring Champion is 70pts, but is that really an effective model? Probably going for an Exalted Sorcerer. For core it’s probably going to be Marauder infantry or cav or War Hounds. You could get one Dragon Ogre in a skeleton 170pts allied contingent. Idk, is that really points well spent? Gigantic Chaos Spawn are awesome, but because of the same restrictions even for one without any Mark of Chaos you’d need minimum 580pts of allies, so you can’t even fit it in a 2000pts army.
edit
I had the rules for allies wrong, you only need one regular unit, not three. Makes it a bit better but still tough
There are also unit-by-unit breakdowns for WoC in the Big Chaos Dwarf tactics compendium