Old School Fire/Dev Respec Help.

The game is quite different than issue 1 and 2. Before looking at builds, familiarize yourself with Enhancement Diversification.

It's a change that was introduced around issue 6 that diminishes the effectiveness of 3 or more of the same kind of enhancement in any power. Typical slotting for blasts for example (if using SOs) usually follow 1 - 2 Accuracy, 3 Damage, 1 - 2 End Redx, 1 - 2 Recharge depending on the cost of the power and how fast you want it to recharge.

Also both fire blast and devices have undergone a number of changes. In fire blast, it is now a good idea to take flares since the animation time for the power has been markedly improved and it's one of the powers you can fire off when mezzed. Under new defiance 2.0 (you probably skipped defiance 1.0), blasters can fire off their tier 1 and 2 blasts and their tier 1 secondary power. So in your case, you can fire off flares, fire blast and web grenade. Also, Defiance is an inherent that works as you fire off powers giving you a damage buff to your attacks as you activate powers.

Smoke grenade is no longer the crutch it once was and is now merely a very optional power that some people take and others don't. It will no longer make you virtually unhittable...that was corrected back in issue 2. Mostly people take it to cap defenses or as a poor person's invisibility.

Sample build (using SOs only) would look something like this:

Hero Plan by Mids' Hero Designer 1.601
http://www.cohplanner.com/

Click this DataLink to open the build!

Fire-Dev sample: Level 50 Technology Blaster
Primary Power Set: Fire Blast
Secondary Power Set: Devices
Power Pool: Leaping
Power Pool: Fitness
Power Pool: Speed
Ancillary Pool: Munitions Mastery

Hero Profile:
Level 1: Flares -- Acc(A), Dmg(3), Dmg(7), Dmg(15), RechRdx(25), RechRdx(40)
Level 1: Web Grenade -- Acc(A), Immob(42), EndRdx(46)
Level 2: Fire Blast -- Acc(A), Dmg(3), Dmg(7), Dmg(15), EndRdx(25), RechRdx(34)
Level 4: Fire Ball -- Acc(A), Dmg(5), Dmg(5), Dmg(17), EndRdx(31), EndRdx(37)
Level 6: Combat Jumping -- Krma-ResKB:30(A)
Level 8: Fire Breath -- Acc(A), Dmg(9), Dmg(9), Dmg(17), Range(37), EndRdx(37)
Level 10: Targeting Drone -- EndRdx(A), ToHit(11), ToHit(11), ToHit(43)
Level 12: Aim -- RechRdx(A), RechRdx(13), RechRdx(13), ToHit(46)
Level 14: Super Jump -- Jump(A)
Level 16: Swift -- Run(A)
Level 18: Blaze -- Acc(A), Dmg(19), Dmg(19), Dmg(21), EndRdx(21), RechRdx(34)
Level 20: Health -- Heal(A), Heal(46)
Level 22: Stamina -- EndMod(A), EndMod(23), EndMod(23)
Level 24: Cloaking Device -- EndRdx(A), EndRdx(43)
Level 26: Hasten -- RechRdx(A), RechRdx(27), RechRdx(27)
Level 28: Trip Mine -- Acc(A), Acc(29), Dmg(29), Dmg(31), Dmg(31), RechRdx(40)
Level 30: Caltrops -- RechRdx(A), Slow(43)
Level 32: Inferno -- Dmg(A), Dmg(33), Dmg(33), RechRdx(33), Acc(34)
Level 35: Smoke Grenade -- Acc(A), ToHitDeb(36), ToHitDeb(36), ToHitDeb(36)
Level 38: Gun Drone -- Acc(A), Dmg(39), Dmg(39), Dmg(39), RechRdx(40)
Level 41: Body Armor -- ResDam(A), ResDam(42), ResDam(42)
Level 44: Cryo Freeze Ray -- Acc(A), Hold(45), Hold(45), RechRdx(45)
Level 47: LRM Rocket -- Acc(A), Dmg(48), Dmg(48), Dmg(48), RechRdx(50)
Level 49: Surveillance -- Acc(A), DefDeb(50), RechRdx(50)
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Defiance

You'll note that I used one IO (Invention Origin) in your build. I'd recommend that you buy and slot a -kb (anti knockback) IO even if you stay with SOs for your character. It's a decent substitute for acrobatics and it costs no endurance. It's pretty much a staple for even SO only characters since the benefits far, far outweigh costs.