I haven’t leveled my mesmer very high yet, as she’s not my main, but I like some of your ideas. I haven’t played her enough to have strong feelings about the shatter mechanic but I have never seen why we need the distinction between clones and phantasms. I also like your ideas about how pseudo pet mechanics could function when the mesmer is in a party. I’m not sure that the mechanic you suggest would be a simplification, but it sounds very fun to play.