Needs a massive boost!
For the most damaging Disciple, its strange that "Assail", the first on the Telekinesis branch, is actually considerably more dangerous.
The entire left side of the branch is HORRID!
The Fiery form Power does NOTHING! Its only for show, on a branch that is supposed all about massive destruction.
Mathias, the Scorcher of Earth, used it to great effect to scare TWO pcs for a couple of rounds, and then sustained it for show, when in reality... there was no real reason to keep it sustained.
It should for all intents and purposes, be the equivalent to the power in DH 1.0 - Ironically, he because he was on FIRE. at the very least, It should give Immunity to fire & melta and LOTs of resistances. An extra TB, Halve damage from Laz, Natural Weapons dealing energy damage- and an aura of fire would all be great instead of +10 to intimidate.
300exp to cauterize blood-loss? I was thinking of having that as a nifty origin ability for a feral worlder. Buying medicae is probably a better idea than taking this particular power.
Flame breath is.... good... it hits the entire team though....
Inferno is good... but again, not nearly as good as, for example, Assail.
And Molten beam is good, but too random. It needs to scale with some sort of minimum damage. 3d5+5 or something.
Combustion is great in theory- but with burning being as it is, its quite weak.
Make this thing a LOT more destructive. A LOT. All of the abilities should have some sort of blast. And Sustained these powers should directly reflect the destructive nature of this disciplines by, instead of hurting the psyker, causing things around to catch fire. He'll think twice about using his powers when the entire-warehouse blows up or collapses onto his heads- but gives him that very good "Firestarter" effect when he's completely pissed off.