Well I think loosing the psion bonus feat is worth it...
I made a mistake. I was reading the text for Psion 6. My mistake. So yes, take Slayer 10. That's the better choice.
Also I need help to select my 17 powers known...
For that, I suggest
my guide. :-)
/selfpimp
It seems that you're planning on making a melee-centric Power Attacking character. So what you want is a few good buffs, but not too many, that will help to strengthen your key role. You don't want to waste all your actions buffing.
The rest of your selections should then A) help you to remain effective when your key role isn't appropriate and B) give you out-of-combat utility.
Here's a short list of suggestions, geared for your specific build:
Level 1Astral Construct..........Shaper Discipline list. For a non-Shaper, THE best power to research, bar none. Create your own Flanking buddy.
Crystal Shard..........Augments very well. Ranged touch attack. For use when wading into melee is a bad choice.
Expansion..........A Psychic Warrior power. Makes you big. Being big means you do more damage.
Synchronicity..........It's pure cheese to me, but by RAW you can give yourself lots of extra actions with this + Linked Power.
Vigor..........This plus Share Pain plus your Psicrystal will be your main buff. It will make you VERY hard to kill.
Level 2Damp Power..........A short-lived, Swift action buff that will all but guarantee that direct damage effects will never bring you down.
Detect Hostile Intent..........Utility and combat use. Nobody will get the drop on you with this. Lasts a fairly long time.
Hustle..........Psychic Warrior power. Sure Egoists get access to it as a 3rd level power. Research this instead to save on PP costs.
Share Pain..........Another key component of your primary buff.
Level 3Dispel Psionics..........Debuffing your enemies can sometimes be better than buffing yourself.
Mental Barrier..........Another short-lived, Swift action buff. For a melee-centric character, it's useful for avoiding otherwise crippling blows.
Solicit Psicrystal..........Use Telekinetic Maneuver than hand off responsibility for managing it to your Psicrystal. Great combo.
Time Hop..........One of the most versatile powers in the XPH. Also a Will-targeting effect that isn't Mind Affecting. Take it.
Touchsight..........Lets you see Invisible creatures and ignore Concealment. Great power.
Level 4Dimension Door..........Not bad. Not great. But there aren't many transportation effects at this level and sometimes fleeing is best.
Metamorphosis..........Full of win. You already know you're gonna take it.
Telekinetic Maneuver..........Use this with Solicit Psicrystal. It'll Trip or Grapple your foes while you thwack them into oblivion.
...so far I was thinking on metamorphosis, P.D.Door Vigor, Share Pain, Concealing Amorpha, and possibly researching some powers from other lists (Perfect Riposte and Schism more likely)
Don't bother with Concealing Amorpha. You've got enough buffs to worry about already.
Perfect Riposte is fine, but again you've already got a lot of buffs to worry about. Look into the Karmic Strike and Robilar's Gambit feats.
Schism is great, especially for a build that is highly self-buff-dependent. Definitely fit it in.