I play both a monk and an Inquis. The thing about brawler and thier high avoidance is it's incredible against blue to white 3ups since thier avoid actually works against them. But when fighting yellow and especially orange con, the mobs don't "miss" your leather wearer near as often.
Pre reactive both group and single before a tough pull and squeeze them debuffs in to ease the pain.
I know it sounds contradictive but middle stance(for the brawler) is much better overall than defensive since you need good dps to burn the mob down. In defensive your tank will miss the mob too much. Stuns, stifles, iterrupts don't work when you can't hit the target.
try this and check your tanks hit%
Advanced Combat Tracker -- An encounter parser for EQ2
good luck