Still, even with only the nice abilities from one creature, you would be strong;
Spellweaver, anyone? How about a Gated Solar.
I just thought of something that makes this even better!
Master Transmogrofist's capstone allows you to combine two creatures into one form. Add these Su abilities, and WIN!
Or Shapechange into a Mindstealer Master, make yourself a Drone, and Gate in and contain a Mindstealer Master. Have your Drone steal its powers.
Have your Drone produce 22 Drones, then have one of those Drones steal its stuff before that month is up. Repeat this process a lot, and you have an army that gets stronger every time it wins a battle; now all we need is a way to bypass immunity to Energy Drain, so that we can rob the Tarrasque and a bunch of the schmexier undead.
And then, yes, we manifest Fusion, after using Temporal Reiteration cheese to keep it perpetual.
This is actually a great way to get rid of enemies, and turn them into allies...