Interesting data. I just 50d my fire/mental/fire. Right now he has SOs. I will look at your post for clues as I start to I/O him. Drain psyche got me from 30-50 in AE soloing large groups. (Thanks to the bloke that wrote the mish with 10 bubble minions). I just sat in the midst of the pack laying out pain in all directions. Drain psyche allowed me the limitless end needed, plus heals to deal with the inevitable lucky shots. I would recommend at least 3 slotting it for Rech. You want this up as often as possible. It seems like you will put I/Os in it, just make sure the set has generous rech.
Curious, why Ice mastery?
Take a look at the recent threads on Fire/MMs. There have been a few nice builds in there. Two major problems that I can see with your build:
1. Build for one kind of Def: Either get S/L to 45%, or Ranged to 45% with AoE to around 30%. Slotting up Frozen Armour and then getting a bunch of Ranged Def set bonuses is inefficient.
There's examples of S/L and Ranged softcapped builds in the last two threads on Fire/MMs.
2. Mezzed attacks: When mezzed, you can still unleash your three most-basic attacks. With a strong recharge, you can even turn Flares and Fire Blast into a chain without Subdual. However, you skipped Fire Blast and underslotted both Flares and Subdual, leaving you almost useless when mezzed 
HTH.
Just an observation on your slotting.
You have performance shifter chance of slotted in drain psyche. You also have stamina 3 slotted. Moving the proc to stamina will give you endurance more often.
You can either move the proc to the third slot in stamina or move the slot. If you move the slot you can put 4 pieces of performance shifter in stamina for some very nice set bonuses. If you move the proc but not the slot, you can put in a recharge proc in drain psyche to have it available more often.
Alright so I've been thinking of making a Fire/MM for a while now, just for pure fun. I plan on taking this mainly for ITF's and STF's since they have alot of spawn and even some AE to farm by myself or with a friend. I would like to just be able to destroy a mob within 2 or 3 hits(If its possible). I've been trying to give myself as much defense as I can while giving me the Recharge that I think I need. Not to sure about WoC, but I added it just to get the 10% Rech and 5% Defense. I'm also not to sure on how to slot Drain Psyche either. If I can get some input that would be Awesome! Also try putting this in your own Mid's the post is different that what I got in the actual Mid's program.
Hero Plan by Mids' Hero Designer 1.601
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Level 50 Technology Blaster
Primary Power Set: Fire Blast
Secondary Power Set: Mental Manipulation
Power Pool: Fitness
Power Pool: Leaping
Power Pool: Speed
Ancillary Pool: Cold Mastery
Hero Profile:
Level 1: Flares
- (A) Thunderstrike - Accuracy/Damage/Recharge: Level 50
- (5) Thunderstrike - Accuracy/Damage: Level 50
- (5) Thunderstrike - Damage/Endurance/Recharge: Level 50
Level 1: Subdual- (A) Accuracy IO: Level 50
Level 2: Fire Ball- (A) Positron's Blast - Damage/Range: Level 50
- (3) Positron's Blast - Damage/Recharge: Level 50
- (3) Positron's Blast - Damage/Endurance: Level 50
- (11) Positron's Blast - Accuracy/Damage: Level 50
- (17) Positron's Blast - Accuracy/Damage/Endurance: Level 50
Level 4: Telekinetic Thrust- (A) Damage Increase IO: Level 50
- (9) Accuracy IO: Level 50
Level 6: Rain of Fire- (A) Positron's Blast - Accuracy/Damage/Endurance: Level 50
- (7) Positron's Blast - Damage/Recharge: Level 50
- (7) Positron's Blast - Accuracy/Damage: Level 50
- (9) Positron's Blast - Damage/Range: Level 50
- (33) Positron's Blast - Damage/Endurance: Level 50
Level 8: Swift- (A) Run Speed IO: Level 50
Level 10: Combat Jumping- (A) Luck of the Gambler - Recharge Speed: Level 50
- (11) Unbounded Leap - +Stealth: Level 50
Level 12: Psychic Scream- (A) Positron's Blast - Damage/Range: Level 50
- (13) Positron's Blast - Damage/Endurance: Level 50
- (13) Positron's Blast - Damage/Recharge: Level 50
- (33) Positron's Blast - Accuracy/Damage: Level 50
- (34) Positron's Blast - Accuracy/Damage/Endurance: Level 50
Level 14: Super Speed- (A) Blessing of the Zephyr - Run Speed, Jump, Flight Speed, Range/Endurance: Level 50
- (15) Blessing of the Zephyr - Run Speed, Jump, Flight Speed, Range: Level 50
- (15) Blessing of the Zephyr - Knockback Reduction (4 points): Level 50
Level 16: Health- (A) Miracle - +Recovery: Level 40
- (17) Numina's Convalescence - +Regeneration/+Recovery: Level 50
Level 18: Concentration- (A) Adjusted Targeting - Endurance/Recharge: Level 50
- (19) Adjusted Targeting - To Hit Buff/Recharge: Level 50
- (19) Adjusted Targeting - To Hit Buff: Level 50
- (42) Adjusted Targeting - Recharge: Level 50
- (43) Adjusted Targeting - To Hit Buff/Endurance/Recharge: Level 50
Level 20: Stamina- (A) Endurance Modification IO: Level 50
- (21) Endurance Modification IO: Level 50
- (21) Endurance Modification IO: Level 50
Level 22: Aim- (A) Adjusted Targeting - To Hit Buff/Recharge: Level 50
- (23) Adjusted Targeting - Recharge: Level 50
- (23) Adjusted Targeting - To Hit Buff/Endurance/Recharge: Level 50
- (43) Adjusted Targeting - Endurance/Recharge: Level 50
- (43) Adjusted Targeting - To Hit Buff: Level 50
Level 24: Drain Psyche- (A) Touch of the Nictus - Accuracy/Healing: Level 50
- (25) Touch of the Nictus - Heal/HitPoints/Regeneration/Recharge: Level 50
- (25) Touch of the Nictus - Healing: Level 50
- (29) Touch of the Nictus - Accuracy/Endurance/Heal/HitPoints/Regeneration: Level 50
- (34) Touch of the Nictus - Accuracy/Endurance/Recharge: Level 50
- (46) Performance Shifter - Chance for +End: Level 50
Level 26: Blaze- (A) Thunderstrike - Damage/Recharge: Level 50
- (27) Thunderstrike - Damage/Endurance: Level 50
- (27) Thunderstrike - Accuracy/Damage: Level 50
- (29) Thunderstrike - Accuracy/Damage/Recharge: Level 50
- (34) Thunderstrike - Accuracy/Damage/Endurance: Level 50
- (50) Thunderstrike - Damage/Endurance/Recharge: Level 50
Level 28: World of Confusion- (A) Coercive Persuasion - Confused/Endurance: Level 50
- (31) Coercive Persuasion - Confused: Level 50
- (33) Coercive Persuasion - Confused/Recharge: Level 50
- (36) Coercive Persuasion - Contagious Confusion: Level 50
- (37) Coercive Persuasion - Accuracy/Confused/Recharge: Level 50
- (46) Coercive Persuasion - Accuracy/Recharge: Level 50
Level 30: Hasten- (A) Recharge Reduction IO: Level 50
- (31) Recharge Reduction IO: Level 50
- (31) Recharge Reduction IO: Level 50
Level 32: Inferno- (A) Obliteration - Accuracy/Damage/Recharge: Level 50
- (40) Obliteration - Accuracy/Recharge: Level 50
- (40) Obliteration - Damage: Level 50
- (42) Obliteration - Accuracy/Damage/Endurance/Recharge: Level 50
- (42) Obliteration - Damage/Recharge: Level 50
Level 35: Fire Breath- (A) Positron's Blast - Accuracy/Damage/Endurance: Level 50
- (36) Positron's Blast - Damage/Endurance: Level 50
- (36) Positron's Blast - Damage/Recharge: Level 50
- (37) Positron's Blast - Accuracy/Damage: Level 50
- (37) Positron's Blast - Damage/Range: Level 50
Level 38: Psychic Shockwave- (A) Obliteration - Accuracy/Damage/Endurance/Recharge: Level 50
- (39) Obliteration - Chance for Smashing Damage: Level 50
- (39) Obliteration - Damage: Level 50
- (39) Obliteration - Accuracy/Recharge: Level 50
- (40) Obliteration - Damage/Recharge: Level 50
- (50) Obliteration - Accuracy/Damage/Recharge: Level 50
Level 41: Snow Storm- (A) Endurance Reduction IO: Level 50
Level 44: Hoarfrost- (A) Doctored Wounds - Endurance/Recharge: Level 50
- (45) Doctored Wounds - Recharge: Level 50
- (45) Doctored Wounds - Heal/Endurance: Level 50
- (45) Doctored Wounds - Heal/Recharge: Level 50
- (46) Doctored Wounds - Heal/Endurance/Recharge: Level 50
Level 47: Frozen Armor- (A) Luck of the Gambler - Defense: Level 50
- (48) Luck of the Gambler - Defense/Recharge: Level 50
- (48) Luck of the Gambler - Recharge Speed: Level 50
- (48) Luck of the Gambler - Defense/Endurance: Level 50
- (50) Luck of the Gambler - Defense/Endurance/Recharge: Level 50
Level 49: Hibernate- (A) Recharge Reduction IO: Level 50
------------Level 1: Brawl
- (A) Empty
Level 1: Sprint- (A) Empty
Level 2: Rest- (A) Empty
Level 1: Defiance------------
Set Bonus Totals: