Just a heads up. With this week's patch we will increase the mastery rank to 90.

We're adding 4 new gameplay obtainable mounts and 32 pets, plus increasing the value of pets to 10 from 5. So given that there's already plenty of leeway past the current cap of 80 this seems reasonable. This also lets us introduce the rank 90 reward which we do have ready - the Cycle of the Master.