Build request: dual pistols/mental and psi/mental, SOs
Without knowing something about your playstyle and goals, it was tough to know how to do this... hoverblaster? blapper? focus on dmg, mitigation, or somewhere in between? Mostly for solo or team play?
So I'll just pretend it's for me 
. Here's what I'd do with a psi/mm if I were limited to SO's (I haven't played DP, so I'll leave that for someone else). I was torn between Scramble Thoughts (mitigation), Scare (slightly less mitigation than scramble, but similar and I like the concept), and Mind Probe (a high-dmg melee attack).
Hero Plan by Mids' Hero Designer 1.952
http://www.cohplanner.com/
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Level 50 Magic Blaster
Primary Power Set: Psychic Blast
Secondary Power Set: Mental Manipulation
Power Pool: Flight
Power Pool: Fighting
Power Pool: Medicine
Power Pool: Leadership
Ancillary Pool: Force Mastery
Hero Profile:
Level 1: Psionic Dart -- Acc(A), Dmg(5), Dmg(5), Dmg(7), RechRdx(7), EndRdx(46)
Level 1: Subdual -- Acc(A), Dmg(9), Dmg(9), EndRdx(45)
Level 2: Mental Blast -- Acc(A), Dmg(11), Dmg(11), Dmg(13), EndRdx(13), RechRdx(48)
Level 4: Telekinetic Blast -- Acc(A), Dmg(15), Dmg(15), Dmg(17), EndRdx(17), RechRdx(45)
Level 6: Hover -- Flight(A), Flight(19)
Level 8: Psychic Focus -- RechRdx(A), RechRdx(19), RechRdx(50)
Level 10: Psychic Scream -- Acc(A), Dmg(21), Dmg(21), EndRdx(23), RechRdx(23), Range(48)
Level 12: Boxing -- Empty(A)
Level 14: Fly -- Flight(A)
Level 16: Concentration -- RechRdx(A), RechRdx(25), RechRdx(50)
Level 18: Psionic Tornado -- Acc(A), Dmg(25), Dmg(27), EndRdx(27), RechRdx(29), RechRdx(29)
Level 20: Drain Psyche -- Acc(A), RechRdx(31), RechRdx(31), RechRdx(31), Heal(33), Heal(33)
Level 22: Tough -- ResDam(A), ResDam(33), EndRdx(34)
Level 24: Weave -- DefBuff(A), DefBuff(34), EndRdx(34)
Level 26: Scramble Thoughts -- Acc(A), Acc(36), EndRdx(36), RechRdx(36), RechRdx(37)
Level 28: Stimulant -- EndRdx(A)
Level 30: Aid Self -- IntRdx(A), IntRdx(37), Heal(37), Heal(46), EndRdx(46)
Level 32: Psychic Wail -- Dmg(A), Dmg(39), Dmg(39), RechRdx(39), RechRdx(40), RechRdx(40)
Level 35: Personal Force Field -- RechRdx(A)
Level 38: Psychic Shockwave -- Acc(A), Dmg(40), Dmg(42), Dmg(42), EndRdx(42), RechRdx(43)
Level 41: Temp Invulnerability -- ResDam(A), ResDam(43), EndRdx(43)
Level 44: Assault -- EndRdx(A), EndRdx(45)
Level 47: Tactics -- EndRdx(A), EndRdx(48)
Level 49: Vengeance -- DefBuff(A)
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Level 2: Swift -- Empty(A)
Level 2: Health -- Heal(A), Heal(50)
Level 2: Hurdle -- Empty(A)
Level 2: Stamina -- EndMod(A), EndMod(3), EndMod(3)
Level 1: Brawl -- Empty(A)
Level 1: Defiance
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 4: Ninja Run
Wow, thank you. And yeah, should have set: I love hoverblasting, I don't know what fraction of play will be solo but it'll be substantial, and I'm not yet sure what balance of mitigation and damage I like but I do like some significant mitigation in the mix. So this looks really, really good for my use.
By the way, I'm happy to see someone else slotting Stamina first. I do it so I don't forget it later. 
Speaking of which, don't place too much value on the order the slots were placed in, I just sort of piled them in. It shouldn't be too tough to figure out which powers need more slots, and when, as you play the toon.
Like more folks these days, I have the obvious reasons to be interested in some SO-only builds. What would y'all suggest for DP/MM and Psi/MM? (Oh, by the way, I'm a Mac user who's been having some hard-to-diagnose emulator weirdness, so text as well as Mids blocks would be appreciated.)
Thank you kindly!