The Mabar event needs to be revamped for next time, some suggestions:
1. 20,000 turn in to launch the dragon event is far too many. The limiting factor becomes scales, and motes become worthless because people dont have the scales to use them. If motes aren't a real motivation theres no point in farming them, which means people wont.. and no Dragon. This is a balance that needs looking into.
YOUR LIMITING ECONOMIC BOTTLENECK SHOULD BE MOTES NOT SCALES!!!!!
2. I failed 2 of my last 3 dragon attempts. The reason for those failures are as follows.
2A. The first failure, there were simply not enough people in the instance. I believe in the entire event we had 14 people. Considering the riduclous amount of effort needed to launch the raid I would think that the difficulty of the raid could be made to scale for smaller groups?
2B. In my second failure We had the opposite. We had 6+ people per room and 2 on each lever, and we all simply lagged solid. Dragon and gargoyles wiped the floor with us.
Some of this is just design issues with the Mabar event itself, and I have high hopes that lessons learned in the new challenges system will be applicable next time, but if they aren't.
IF YOU CAN'T GET THE MABAR EVENT TO WORK DO NOT HOLD THE MABAR EVENT. THROWING A NON-FUNCTIONAL EVENT JUST TO FRUSTRATE YOUR PLAYERS IS AN UNWISE DECISION.