I am a prot monk and have teamed up with various groups/builds. I can say the following:
1. bonds don't work - don't try them as they get shattered constantly
2. use a standard prot build (e.g. orison, reversal, prot spirit, aegis, guardian/shielding hands, remove hex/holy veil and rebirth) I can do most of the prot needed. Elite must be spell breaker. The mob is mesmer mostly so you can hear all the failed spell cast sounds from them once I sb our nuker or tank.
3. you have to get rangers with traps (dust and barb) to slow down their grasps of insanity so that the casters have a chance to kill them.
4. Wards against xxx are very useful, as well as a ss necro with blood ritual. The eles need to have glyph of concentration or prepared to be interrupted.
5. on average i use 3-4 candy canes per full run
6. prepare to spend 2.5-3 hours for a full run and make sure u have a good Internet connection. We had a guy dc'ed in level 4 and that's not very nice.
Overall I'm quite impressed with this new challenge.