I was able to get to level 30 mostly by using Weapon Mastery combos, Telekinetic Push, Psychic Resonance, Telekinetic Shield, and Convalesce. Weapon attacks were making up the vast majority of my damage output. I also tried using some other loadouts on the way to 30, but the long power cooldowns turned me off to using them. As for Pyrokinesis, it stopped providing a DoT as of Saturday. Look at the patch notes in the first post and you'll see the DoT removal. I thought removing the DoTs from Burning was very weird. Burning was always a terrible DoT, but it was something. I think the idea behind Thought Bubble is that it is supposed to do terrible damage because it is your Supercharge Generator power. I'd suggest trying out Mental in some group content. Everything in the 1 to 30 content can be steamrolled with a terrible loadout. You don't really get a full appreciation of some of the issues with Mental until you're playing with other people.