An idea to get more tank and possible healers queuing for this.

Change the reward to be an item that will award ALL from that run.

Example: I run leveling roulette as tank when tank is in need. All the EXP from that run is then added to the item I get in the end. I swap over to my other class I'm leveling and use that item to award the EXP to that class/job.

Now the EXP for just queuing for the daily roulette would be percent based as I don't think you should get 1.3million exp on a level 5 class. It would reward you 33% of your level.

In short, this would get me queuing for my daily roulettes on my tank rather than dps. Tanks are always in heavy need but I'm not going to run my daily MSQ on my max level tank. That's silly.