Ziggy opener:
TFU II admirers are known and loved for deducing verdicts in a monotonous fashion. The sentiment can largely be summed upped in a single sentence
- Raw power trumps all, and raw power should be measured with feats against inanimate objects..
There's enough examples to refute this idea, as moving heavy and large inanimate objects is almost never a good indicator of how well one performs in combat, for that, you should look at how well one performs in combat... moving on - Nhilly has Galen outclassed in both departments - mastery of Force techniques and power.
Between draining planets, raising the Raveger with other ships from orbit and interestingly enough, holding the Ravager together with his own TK. That last feat means he has to keep it in place when undergoing acceleration, preventing it from falling into pieces. The kind of acceleration we're talking about here is very likely to be 30,000 m/s after 1 second based of similar vessels. But even if I was to half that figure, the kind of energy needed to contain his ship would be measured in Gigatons of Joules, far exceeding Starkiller's frigate explosion which was already exhaulted on a half damaged Vessel.
Everything else is Nihilus' game in my eyes, his last stand suffering from a series of compounding circumstances that would inevitably make his performance much worse. He could probably just drain S'killer too, ending the fight before it began.