I also want to point out a fact most mystics do not consider and its a dam nice spell. The healing pet. Umbral attendant. At Adept 3 the spell is doing a 250+ group heal over time. That makes a major difference on the scenario. When soloing that makes up for any dots you get on you till you clear them and also adds to the tad of healing you may need between wards. It gives the benefit or torpor without the drawbacks. And since its a pet if your raiding with more then one mystic the pets should stack since they are not an actual spell placed on people.
The mystics are certainly a dam good class if played well. I will say its frustrating to have the majority of our first set of AA linked to the "onehitwonder" pet but that does not make the class suck it just makes the AA line suck. Our abilities would be better if they were given to us and not the dog. Or at least give us buffs we can give the dog to add to his survivability besides the one we get for spending 24 points on the STR line.
The legitimate complaints I could say we have is that I wish our AA lines were not do dogdog centric like the other classes and if they do stay that way dogdog does need a hitpoint boost. I dont want him to be able to tank or anything thats his job but at least surviving past one or two swings would be nice since soo many AA are spent on making him usefull. Other classes get runbuffs and abilities they can use as long as they are alive. We get a ton of abilities that have a large chance of not providing benefit in the fightbecause one wrong move from the dog or one AE and the AA are all gone.