I don't know how well this game will work, but it's worth a shot. The way it's played is I'll start by listing a class, the next person should imagine themselves playing a single-class challenge with this class. The question to them is: What single ability from another class would you choose to use with your single-class characters and why?

For an example I'll start with the class of Summoner. If I could choose one single ability it would be Short Charge from Time Mages so summons can be cast quicker. The next poster should imagine themselves with a group of Time Mages and state what single ability would they like to take advantage of and why.

Rinse and repeat.

Time Mage. Go!