I've always played brd in t8. I always play to my highest potential, keeping straight shot and dots up 100% of the time, making use of every straighter shot proc, and using invigorate the second it's off cooldown, starting with the first one right after I dip below 600tp. I have never, ever had to use paeon. I'm not saying I never came close to running out, I'm just saying that I never actually did. Granted, I've also never had a mnk in t8 with me. That I'm sure would have changed things, but again, mnk is the exception to the rule, being the only physical dps without access to invigorate.