Dissipate is super useful with our new Quickened Aetherflow trait. You can reduce the cool down on Aetherflow to 30 seconds with it if you use all six AF stacks quickly enough. You also have to keep in mind that abilties that use MP should be your last resort as a Scholar. I save Largesse for situations where I am out of stacks because it only affects spells. When you mix this with the healing potency bonus of dissipation you get incredibly strong spells that almost seem to warrant the high MP cost. If you are super tactical you always make sure to use Eos healing up ability before Dissipation as well and then you have 20 seconds to rely on Succor with full confidence that your heals are legendary.