Part of being good in a DPS class is knowing exactly when are the safe periods to use BfB. Assuming your tank is good, and you aren't ripping aggro off your tank, that 25% damage taken portion is negligible. Switching to a tank is fine and all, and it certainly requires less cross-class skills (if you are playing Warrior, PLEASE at least get Provoke. It's a key skill, and please don't be lazy about this).
If you don't care about the basics, I don't know how you expect people to help you out really. Most people are happy to help out, but you have to show that you have put in some effort yourself.
