not worth it. fire/kin is largely useless in pvp.
It's ok in zones. You might be able to End drain them then damage them down to 0.
Won't be as good in Arena or team settings.
Questions about the game, either side? /t @Neuronia or @Neuronium, with your queries!
168760: A Death in the Gish. 3 missions, 1-14. Easy to solo.
Infinity Villains
Champion, Pinnacle, Virtue Heroes
I think you should go with the sonic/em instead.
Shenanigans
LotD - JaL - POWT/SMD - SoCo - AJs
If you already have the fire/kin...just take it to RV and play.
Remember people, he's talking about a toon he ALREADY has, not about what toon he should MAKE.
Fire/kins can be useful for sapping and annoying the hell out of people with controls. Go to RV and see if you have fun.
I actually toon my f/k and specced her for pvp once and rather enjoyed it. while she was not the most damaging of all of my pvpers it was a hella nice change of pace. the only problem that i had was healing when i was not in melee range of anyone, fighting a brute, or even a stalker though is ridiculously awesome. By the time they do any damage to u, even AS, u can just heal it all back, then suck all their damage/regen/end/and recharge in a few seconds while your imps tear them up. I remember I started on a team where i was pretty much ignored save giving SB periodically to help out others, I went from being ignored to quickly being the largest target for the other team, between giving SB and debuffing the crap out of whatever we were spiking i was a force to b recconed with. (sp?) All in all its hella fun, but ull get picked on like crazy, with ranged damage being ur main weakness. O and stone patron coupled with FS and siphon power does crazy damage, just for future reference 
Hey guys i just hit 4 billion on my fire/kin and wanted to see if i could make him pvp.... I really love my fire/kin but if you think he has no chance in pvp just say so and i could just as easily roll out a sonic/em blaster wit my alt account.....I want to Pvp mostly in Arena and RV...here is the build go ahead and tear it up
Hero Plan by Mids' Hero Designer 1.401
http://www.cohplanner.com/
[u]Click this DataLink to open the build![u]
Level 50 Science Controller
Primary Power Set: Fire Control
Secondary Power Set: Kinetics
Power Pool: Fighting
Power Pool: Speed
Power Pool: Fitness
Power Pool: Leadership
Ancillary Pool: Primal Forces Mastery
Hero Profile:
Level 1: Char -- UbrkCons-Hold:50(A), UbrkCons-Hold/Rchg:50(7), UbrkCons-Acc/Hold/Rchg:50(31), UbrkCons-Acc/Rchg:50(31), UbrkCons-EndRdx/Hold:50(31), HO:Endo(34)
Level 1: Transfusion -- Nictus-Heal:50(A), Nictus-Heal/HP/Regen/Rchg:50(3), Nictus-Acc/Heal:50(3), Nictus-Acc/EndRdx/Heal/HP/Regen:50(5), Nictus-Acc/EndRdx/Rchg:50(5)
Level 2: Ring of Fire -- GravAnch-Hold%:50(A), GravAnch-Acc/Immob/Rchg:50(37), GravAnch-Immob/EndRdx:50(39), GravAnch-Immob/Rchg:50(40), GravAnch-Acc/Rchg:50(40)
Level 4: Repel -- FrcFbk-Rechg%:50(A), KBDist-I:50(48)
Level 6: Kick -- HO:Nucle(A), HO:Nucle(7), HO:Nucle(34)
Level 8: Hasten -- RechRdx-I:50(A), RechRdx-I:50(9), RechRdx-I:50(9)
Level 10: Flurry -- C'ngImp-Acc/Dmg:50(A), C'ngImp-Dmg/EndRdx:50(11), C'ngImp-Dmg/Rchg:50(11), C'ngImp-Acc/Dmg/Rchg:50(13), C'ngImp-Acc/Dmg/EndRdx:50(13), C'ngImp-Dmg/EndRdx/Rchg:50(15)
Level 12: Siphon Speed -- TmpRdns-Acc/Slow:50(A), TmpRdns-Acc/Dmg/Slow:50(15), TmpRdns-Acc/EndRdx:50(17), TmpRdns-Rng/Slow:50(17), TmpRdns-EndRdx/Rchg/Slow:50(29), P'ngTtl--Rchg%:50(29)
Level 14: Super Speed -- HO:Micro(A)
Level 16: Hurdle -- Jump-I:50(A)
Level 18: Health -- Numna-Regen/Rcvry+:50(A), Numna-Heal:50(19), Mrcl-Rcvry+:40(19), RgnTis-Regen+:30(27)
Level 20: Stamina -- P'Shift-End%:50(A), EndMod-I:50(21), EndMod-I:50(21), EndMod-I:50(27)
Level 22: Flashfire -- Stpfy-Acc/Rchg:50(A), Stpfy-EndRdx/Stun:50(23), Stpfy-Acc/EndRdx:50(23), Stpfy-Stun/Rng:50(25), Stpfy-Acc/Stun/Rchg:50(25)
Level 24: Maneuvers -- LkGmblr-Rchg+:50(A), Krma-ResKB:30(34)
Level 26: Tough -- S'fstPrt-ResKB:30(A)
Level 28: Inertial Reduction -- Jump-I:50(A)
Level 30: Tactics -- AdjTgt-ToHit:50(A), AdjTgt-ToHit/Rchg:50(40), AdjTgt-ToHit/EndRdx/Rchg:50(43), AdjTgt-EndRdx/Rchg:50(46), AdjTgt-ToHit/EndRdx:50(46)
Level 32: Fire Imps -- S'bndAl-Build%:50(A), ExRmnt-+Res(Pets):50(33), HO:Nucle(33), HO:Nucle(33), HO:Nucle(43)
Level 35: Transference -- Efficacy-EndMod:50(A), Efficacy-EndMod/Rchg:50(36), Efficacy-EndMod/Acc/Rchg:50(36), Efficacy-Acc/Rchg:50(36), Efficacy-EndMod/Acc:50(37), Efficacy-EndMod/EndRdx:50(37)
Level 38: Fulcrum Shift -- Acc-I:50(A), Acc-I:50(39), RechRdx-I:50(39)
Level 41: Power Blast -- Decim-Acc/Dmg:40(A), Decim-Dmg/EndRdx:40(42), Decim-Dmg/Rchg:40(42), Decim-Acc/EndRdx/Rchg:40(42), Decim-Acc/Dmg/Rchg:40(43)
Level 44: Temp Invulnerability -- ImpSkn-ResDam/EndRdx:30(A), ImpSkn-ResDam/Rchg:30(45), ImpSkn-EndRdx/Rchg:30(45), ImpSkn-ResDam/EndRdx/Rchg:30(45), ImpSkn-Status:30(46)
Level 47: Power Boost -- RechRdx-I:50(A), RechRdx-I:50(48), RechRdx-I:50(48)
Level 49: Energy Torrent -- Posi-Dam%:50(A), HO:Nucle(50), HO:Nucle(50), Dmg-I:50(50)
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Containment
------------
[u]Set Bonus Totals:[u]<ul type="square">[*]4.5% DamageBuff(Smashing)[*]4.5% DamageBuff(Lethal)[*]4.5% DamageBuff(Fire)[*]4.5% DamageBuff(Cold)[*]4.5% DamageBuff(Energy)[*]4.5% DamageBuff(Negative)[*]4.5% DamageBuff(Toxic)[*]4.5% DamageBuff(Psionic)[*]5.4% Max End[*]3% Enhancement(Stun)[*]1.5% Enhancement(RunSpeed)[*]63.8% Enhancement(RechargeTime)[*]55% Enhancement(Accuracy)[*]1.5% Enhancement(JumpSpeed)[*]1.5% Enhancement(FlySpeed)[*]1.5% Enhancement(JumpHeight)[*]5% Enhancement(Heal)[*]87.7 HP (8.63%) HitPoints[*]Knockback (Mag -8)[*]Knockup (Mag -8)[*]MezResist(Confused) 7.5%[*]MezResist(Held) 7.5%[*]MezResist(Immobilize) 12.5%[*]MezResist(Sleep) 9.7%[*]MezResist(Stun) 7.5%[*]MezResist(Terrorized) 7.5%[*]13.5% (0.23 End/sec) Recovery[*]22% (0.93 HP/sec) Regeneration[*]10% Resistance(Smashing)[*]10% Resistance(Lethal)[*]15% Resistance(Fire)[*]15% Resistance(Cold)[*]11.3% Resistance(Energy)[*]11.3% Resistance(Negative)[*]10% Resistance(Toxic)[*]12.5% Resistance(Psionic)[*]2% XPDebtProtection[/list]