I'm not a build expert, but here's one possibility. I focused on softcapping ranged defense, but also got decent set bonuses for recharge and damage. The melee defense is low, but hover will keep you out of melee most of the time, and the build has good smashing/lethal resistance in case you get tagged.
I dropped Short Circuit and 2 of the melee attacks to make room for the Fighting pool, but that might not fit your playstyle. This build is geared toward hover blasting and control (with 3 well-slotted holds, plus knockdown added to 2 of the AoEs).
I dipped into the Concealment pool to get more mules for LoTG global recharge IOs, and to get you a little extra def from Stealth. Alternatively, you could take Leadership for maneuvers, tactics/assault, and vengeance, but you'd need to drop 1 other power to get there. (Tactics is better for blasters than it used to be because To Hit bonuses now increase the damage of your quick snipe, so that's another reason to consider Leadership.)
Also, I used the Titanium Coating set in Charged Armor, but Unbreakable Guard might be a better choice.
Hero Plan by Mids' Reborn : Hero Designer 2.6.0.7 https://github.com/ImaginaryDevelopment/imaginary-hero-designer
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Level 50 Mutation Blaster Primary Power Set: Electrical Blast Secondary Power Set: Electricity Manipulation Power Pool: Flight Power Pool: Speed Power Pool: Fighting Power Pool: Concealment Ancillary Pool: Electrical Mastery
Hero Profile: Level 1: Lightning Bolt -- Apc-Dmg(A), Apc-Dmg/Rchg(3), Apc-Acc/Dmg/Rchg(5), Apc-Acc/Rchg(5), Apc-Dam%(17) Level 1: Electric Fence -- Thn-Acc/Dmg(A), Thn-Acc/Dmg/Rchg(29), Thn-Dmg/EndRdx(37), Thn-Dmg/Rchg(46), Thn-Acc/Dmg/EndRdx(50), Thn-Dmg/EndRdx/Rchg(50) Level 2: Ball Lightning -- Rgn-Dmg(A), Rgn-Dmg/Rchg(3), Rgn-Acc/Dmg/Rchg(7), Rgn-Acc/Rchg(7), Rgn-Knock%(25) Level 4: Hover -- LucoftheG-Def/Rchg+(A) Level 6: Hasten -- RechRdx-I(A), RechRdx-I(11) Level 8: Aim -- RechRdx-I(A), RechRdx-I(9) Level 10: Havoc Punch -- Mk'Bit-Acc/Dmg(A), Mk'Bit-Dmg/EndRdx(11), Mk'Bit-Dmg/Rchg(40), Mk'Bit-Acc/EndRdx/Rchg(43), Mk'Bit-Acc/Dmg/EndRdx/Rchg(43), Mk'Bit-Dam%(43) Level 12: Zapp -- ExcCnt-Acc/Dmg(A), ExcCnt-Dmg/EndRdx(13), ExcCnt-Dmg/ActRdx(13), ExcCnt-Dmg/Rng(15), ExcCnt-Dmg/Rchg(21), ExcCnt-Stun%(40) Level 14: Fly -- BlsoftheZ-Travel(A), BlsoftheZ-ResKB(21) Level 16: Build Up -- RechRdx-I(A), RechRdx-I(17) Level 18: Tesla Cage -- Lck-Acc/Hold(A), Lck-Acc/Rchg(19), Lck-Rchg/Hold(19), Lck-EndRdx/Rchg/Hold(23), Lck-Acc/EndRdx/Rchg/Hold(23), Lck-%Hold(34) Level 20: Force of Thunder -- EndMod-I(A), EndMod-I(25) Level 22: Kick -- Empty(A) Level 24: Tough -- StdPrt-ResDam/Def+(A), GldArm-End/Res(31), GldArm-ResDam(31), GldArm-3defTpProc(31) Level 26: Weave -- LucoftheG-Def/Rchg+(A), LucoftheG-Def/EndRdx(27), LucoftheG-Def(27), LucoftheG-Def/EndRdx/Rchg(29) Level 28: Stealth -- LucoftheG-Def/Rchg+(A) Level 30: Afterburner -- LucoftheG-Def/Rchg+(A) Level 32: Thunderous Blast -- SprBlsWrt-Acc/Dmg(A), SprBlsWrt-Dmg/Rchg(33), SprBlsWrt-Acc/Dmg/Rchg(33), SprBlsWrt-Acc/Dmg/EndRdx(33), SprBlsWrt-Acc/Dmg/EndRdx/Rchg(34), SprBlsWrt-Rchg/Dmg%(34) Level 35: Shocking Bolt -- Lck-Acc/Hold(A), Lck-Acc/Rchg(36), Lck-Rchg/Hold(36), Lck-EndRdx/Rchg/Hold(36), Lck-Acc/EndRdx/Rchg/Hold(37), Lck-%Hold(37) Level 38: Shocking Grasp -- UnbCns-Hold(A), UnbCns-Hold/Rchg(39), UnbCns-Acc/Hold/Rchg(39), UnbCns-Acc/Rchg(39), UnbCns-EndRdx/Hold(40) Level 41: Charged Armor -- TtnCtn-ResDam/EndRdx(A), TtnCtn-ResDam/Rchg(42), TtnCtn-ResDam/EndRdx/Rchg(42), TtnCtn-ResDam(42) Level 44: Charged Bolts -- Thn-Acc/Dmg(A), Thn-Dmg/EndRdx(45), Thn-Dmg/Rchg(45), Thn-Acc/Dmg/Rchg(45), Thn-Acc/Dmg/EndRdx(46), Thn-Dmg/EndRdx/Rchg(46) Level 47: Static Discharge -- OvrFrc-Acc/Dmg(A), OvrFrc-Acc/Dmg/End(48), OvrFrc-Dmg/End/Rech(48), OvrFrc-Acc/Dmg/End/Rech(48), OvrFrc-Dam/KB(50) Level 49: Grant Invisibility -- LucoftheG-Def/Rchg+(A) Level 1: Brawl -- Empty(A) Level 1: Defiance Level 1: Quick Form Level 1: Prestige Power Dash -- Empty(A) Level 1: Prestige Power Slide -- Empty(A) Level 1: Prestige Power Quick -- Empty(A) Level 1: Prestige Power Rush -- Empty(A) Level 1: Prestige Power Surge -- Clr-Stlth(A) Level 1: Sprint -- Empty(A) Level 2: Rest -- Empty(A) Level 4: Ninja Run Level 2: Swift -- Empty(A) Level 2: Health -- Pnc-Heal/+End(A), NmnCnv-Regen/Rcvry+(9), Mrc-Rcvry+(15) Level 2: Hurdle -- Empty(A) Level 2: Stamina -- PrfShf-End%(A) ------------