I think it is also worth mentioning that if the smoke is to that point, meaning you think you have fire above you; Use a straight stream, don't fog it unless you like blistered ears. This will seem like an obvious comment to the smoothbore brothers but to the young foggys it may not be as apparent. I had been taught that this tactic could be used, I got blistered. I've been in the area when others have tried it, I got blisters then too, at least the other times, I had company.
I also believe if we're to a point that we're trying to ward off roll/flashover and we still can't see the seat of the fire, throw the water until drops of water start coming down, meaning, we've got the temp lowered below 212.
Speaking of high ceiling; Watch out for the dropped "ceilings", the reason for the parentheses is because if one tile is dislocated close to the fire, it isn't a ceiling any longer; It's a hot gas collector.