[PF] Building the best Blasting Wilder

[Mostlymad]

Given a 25 point buy, how would you improve the build below? I've only built it out to level 12. Feel free to suggest additions to it up to level 20.


Mostlymad's Mostly Broken Blaster Wilder
As far as stats go you really only need Cha and a 13 in Wis (for Psionic Meditation). Cha>Dex>Wis(13)>Con>Int>Str is how I would prioritize.


Race
Human

Stats
Str: 7
Dex: 16
Con: 12 [14 -2(Surge Crystal)]
Int: 8
Wis: 13
Cha: 22 [17 +2(Human Bonus) +3(all level advancement into Cha)]

Classes
Wilder (Student Surge)1
Sorcerer (Xblooded Draconic(White/Silver)/Orc)1
Wilder (Student Surge)2-19

Traits
Reactionary (+2 Initiative)
Psigifted (Energy Ray +1ML)

Feats
H: Improved Initiative, 1: Empower Power, W: Psicrystal Affinity (Nimble +2 Init)
S: Eschew Materials
3: Wildblood Mage
5: Favored Energy (Cold)
6: Psionic Meditation
Expanded Knowledge: Untouchable Aura
7: Quicken Power
9: Psicrystal Containment
Expanded Knowledge: Energy Missile
11: Weapon Focus: Ray?

Spells/Powers:
P1: Energy Ray
S1: Shield, S1: Vanish, S1: Reduce Person
P1: Inevitable Strike
HR1: Vigor, P2: Detect Hostile Intent
EK1: Untouchable Aura
P3: Energy Burst
HR3: Touchsight, P4: 3-Energy Wall
EK3: 2-Energy Missile
P5: Power Resistance

Equipment List
Psicrystal Staff, Greater (10000gp)
-Setting Stone of Invigoration (+1ML)(10080gp)
Headband: Surge Crystal (+1ML, 15k)(+2ML, 30k)(+3ML, 60k)


At level 12 the wilder using the above feats can pump out a generic Cold Energy Ray that does 85-170 (112-225 Empowered) damage without using equipment.

Using the above listed equipment the Wilder, in the first round, can put anywhere from 239-480 total damage on a single target. Damage drops to 142-285 per Energy Ray over the following rounds. Granted, this is only using Energy Ray at a single target. If you were to use Energy Missile, the numbers would be a slightly lower per missile but you could easily bomb up to five targets with numbers close to the above (you are only losing out on 1ML).

Powers chosen were based around giving as much defense to the Wilder to keep him alive once focused on. Really, it's more of a PVP build for an upcoming arena game I will be participating in. I really tried to maximize the damage in this build.

I've another build that is a little more well rounded that isn't a one trick pony for the Wilder. I'll post it once I've had my fun playing around with it.

Any suggestions to make this build better?