Malgor, Can you post what you have now? Have you timed your click speed and added enough commas so you are not casting over you existing HoTs?

If you don't need all the HoTs up all the time, you could have a second key that just rolls rejuvenation and lifebloom.

I run a BM hunter in one of my mixed teams just because the pet is a good amount of DPS that i don't have to micro manage, and the BM rotation is simple to click macro.