Just for fun I decided to figure out all the ways one can buff charmed enemies (most common use would be for the puppies in Hound of Xoriat)... and I discovered a few things...
Mostly that there are many abilities that do not actually buff your charmed minions that many people think do.
At least via examining the charmed creatures, the following do NOT apply:
Consecrate with Crusade (+10% bonus damage)
Summer Smoke (chance to do +15d20 fire damage)
Supple as Spring (+3% dodge when hit)
Bardic Ballad buffs (too many effects to mention)
I tested this with Dominate Monster. Perhaps the puppies in HoX/LHoX react differently? I (or someone else) will have to test these on them, but if they are consistent with other charmed/suggested/dominated/thrall'ed enemies, then yeah, non of those actually apply to them.
Is this WAI?