Why wouldn’t it work in raid? Survival hunter is being tooled to do something similar and seems to parse just fine.
You bring an oomkin because they have the Aura of Free Raid Slot ability which gives your mages and warlocks free crit.
Speaking of, Blizz, make sure that the oomkin crit bonus is spell power crit only, while the feral crit bonus is physical crit only.