Combine two of the good old ones.
Monking in arenas with no party bar and using a build consisting of guardian, infuse, healing touch, remove hex and mend ailment.
I know that's outdated and it won't work as well for practice as it once would. But you get the idea.
You have some skills that aren't the best, but all have a single purpose.
It teaches you when you need to do what to survive.
The key element is that you only need to survive, not keep every team member at full health and all conditions and hexes off.