I've been messing with Meladru's resiliance on the classes lately and all i can say is WOW to the Mesmer / Ranger builds.
I rolled a mesmer with 11 faster casting, 15 domination, and 10 wilderness survival.
I've been pretty disapointed with the elite skills in domination magic so taking a secondary class elite wasn't that hard of a choice for me.
The only thing that takes more aggression than a monk is the mesmer. I usually find myself with backfire and other nasty things on myself while playing in Arenas.
The look on peoples faces when you cast Melandru and Troll is priceless. I had some people waste counter spells on me since they thought I was going to cast something. Probably the funniest thing that happend to me was when a ranger tried hitting me with concussion shot.
When people do jump all over you you'll be able to tank a good deal of it. The energy regen on Melandru will also let you take all the nasty domination spells without worrying about running out.
Pretty much anything works, but i'd take Empathy and Blackout for sure. Blackout drains addrenaline. I found myself using it more on warriors than monks while playing around in Ra.