Blm's are one of the highest dmg jobs if your tank is good you can go full tilt and you won't pull mobs off them. If you tank hasn't learned how to use their skills and abilities and how often to use ones like flash and circle of scorn and you pull mobs off them and you're using quelling strikes it's their fault for loosing aggro not yours.

I had a similar scenario today where I had to slow my dps down on my blm to literally snail speed to avoiding pulling everything off the tank. Like I would use fire 2 then wait a few before using it again or I risked pulling everything off the tank, I ended up having to switch to single target over aoe and even then had to slow my dps and wait a few before using fire 1 again cause the first one I gained a ton of aggro from.