Hmmm... here is my UW tank build.
Tactics 12
Healing 12
Axe (Leftovers)
strength (leftovers)
Armor Platemail +major absorption (Haven't found a Sup yet)
Wep: maxed customized spicy axe of fortitude +26
Shield: Collectors +45 hp (stance) -2 damage 16 armor
Gladiators Defense {elite}
Shield Stance
Bonettis Defense
Defensive Stance
Watch Yourself
Cyclone axe
Healing Breeze
Restore Life
Stances can be kept up full time and healing breeze offsets bleeding from Aatxes. You could also replace healing with protection and take pro spirit if you want.
Cyclone axe is to help do a little more damage and kick bonettis d faster.
If you are good you can get rid of Defensive stance and add another healing or protection skill. Defensive stance is only needed if you don't want to pay attention and keep adreneline up for bonettis between glads and shield stance.
I can tank 2-3 Aatxes for a good amount of time using this build.
You can also switch to smiting and add SoJ and or SoW for extra damage as long as your monk is paying attention to his/her healing.
Edit: No Sword, Gash, or mending