Are you dead set on having Creation as your Dominant Ideal? Freedom seems like a much better choice to me. I'm also noticing a distinct lack of Boost Construct for someone taking DI: Creation.
Also, I'd be inclined to take Freedom at level 3 instead of Life. You get Hustle sooner, and the higher level Life powers are redundant with the lower ones. You don't need both Touch of Health and Body Purification, for instance. Really, all you
out of Life is Stygian Ward and Psionic Restoration. One or two of the healing powers would be nice, but not necessary. You can safely put this off til your 5th level Assume Mantle.
Remember that you don't automatically learn all the powers in your mantles. I went through and made a possible power progression for you.
The numbers after each level are the number of powers known from each mantle in the order (Creation,Guardian,Freedom,Life). Remember that you have to pick powers such that you never have more powers from a secondary mantle than a primary mantle.
1. Astral Construct, Vigor (1,1)
2. Psionic Minor Creation (2,1)
3. Share Pain (2,2)
4. Hustle (2,2,1)
5. Body Purification (2,2,1,1)
6. Sense Danger (2,2,2,1)
7. Stygian Ward (2,2,2,2)
8. Psionic Fabricate (3,2,2,2), Guardian becomes Secondary and Freedom becomes Primary
9. Psionic Major Creation (4,2,2,2)
10. Psionic Freedom of Movement (4,2,2,3), Dominant Ideal:Freedom
11. Psionic Restoration (4,2,3,3)
12. Psionic Overland Flight (4,2,3,4)
13. Mass Ectoplasmic Cocoon (5,2,3,4)
14. Mend Wounds (5,2,4,4)
15. Mass Time Hop (5,2,4,5), pick another mantle
16. True Metabolism (5,2,5,5) or 8th level power from another mantle
17. Psionic True Creation (6,2,5,5)
18. ??
19. ??
20. ??
For your 15th level Mantle pick, I'd go with something that gives you either a neat Mantle ability like Fate, or access to really good high level powers like Deception or Death if your DM rules that you're immune to insanity while under Stygian Veil.