Spine/Fire for fun and farm: Mid Build Help

After reading through so many awesome threads I would love an expert critique and help to build my Spine/Fire. I've gotten my dm/sd built like a beast and my el/sd built the way I like thus far, but when it comes to Spine/Fire, my mid build is meh! I still feel like a newby when it comes to using mid like a child with a new toy. I've gotten to understand positionals and single defense build but I'm having a bit of a problem with this one.

Beelz did a great job on the data spread and I noticed that the spine is near to the bottom of the list but I felt it would be fun to build one anyways since the farm thread mentioned spine/fire would be great. Yes yes, I know, why build one when I already have el/sd to play with. Reason: playing style, I just wanna play it for fun since it seemed different from what I normally play. It's the fun of building I like and I'd like some great help if possible. I'm not worried about Inf and the cost to build since I have alot of lvl 50s I play. I'm on a scrapper loving binge lately and I would love your help.

Here's my 1st mid draft: NOTE:

1: I'm totally lost if i want "RotP" and how I would slot it so I left it with only 1 slot.
2: I noticed this is a tight build without the help of body mastery or using epic like fire to boast farm fun, so I left that one out too.

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

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It looks ok, but doesn't seem like you're going in any specific direction as far as set bonuses go. Myself, I built towards defense and ended up with about 35% to melee. Spines doesn't need much recharge for a solid AoE chain.

As far as your questions, just the base slot for RotP is enough with one recharge IO. Since I went the defense route it was indeed a tight build and I couldn't fit in epic powers. Here's my build for an idea.

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

Click this DataLink to open the build!

In-Flames: Level 50 Magic Scrapper
Primary Power Set: Spines
Secondary Power Set: Fiery Aura
Power Pool: Leaping
Power Pool: Fighting
Power Pool: Fitness
Power Pool: Speed

Hero Profile:
Level 1: Lunge -- T'Death-Acc/Dmg(A), T'Death-Dmg/EndRdx(3), T'Death-Dmg/Rchg(3), T'Death-Acc/Dmg/EndRdx(15), T'Death-Dmg/EndRdx/Rchg(40), T'Death-Dam%(43)
Level 1: Fire Shield -- RctvArm-ResDam(A), RctvArm-EndRdx(13), RctvArm-ResDam/EndRdx(13), RctvArm-ResDam/EndRdx/Rchg(15)
Level 2: Spine Burst -- Oblit-Dmg(A), Oblit-Acc/Rchg(5), Oblit-Dmg/Rchg(5), Oblit-Acc/Dmg/Rchg(9), Oblit-Acc/Dmg/EndRdx/Rchg(9), Oblit-%Dam(43)
Level 4: Healing Flames -- Dct'dW-Rchg(A), Dct'dW-Heal/Rchg(7), Dct'dW-Heal/EndRdx/Rchg(7), Dct'dW-EndRdx/Rchg(19), Dct'dW-Heal(19)
Level 6: Combat Jumping -- LkGmblr-Rchg+(A)
Level 8: Boxing -- Mako-Dam%(A)
Level 10: Impale -- Thundr-Acc/Dmg(A), Thundr-Dmg/EndRdx(11), Thundr-Dmg/Rchg(11), Thundr-Acc/Dmg/Rchg(34), Thundr-Acc/Dmg/EndRdx(36), Thundr-Dmg/EndRdx/Rchg(50)
Level 12: Hurdle -- Jump-I(A)
Level 14: Super Jump -- Zephyr-ResKB(A)
Level 16: Plasma Shield -- ImpArm-ResDam(A), ImpArm-ResDam/EndRdx(17), S'fstPrt-ResDam/Def+(17)
Level 18: Health -- Numna-Regen/Rcvry+(A), Mrcl-Rcvry+(37)
Level 20: Stamina -- P'Shift-EndMod(A), P'Shift-EndMod/Rchg(21), P'Shift-EndMod/Acc(21), P'Shift-End%(37)
Level 22: Hasten -- RechRdx-I(A), RechRdx-I(23), RechRdx-I(23)
Level 24: Consume -- Oblit-Dmg(A), Oblit-Acc/Rchg(25), Oblit-Dmg/Rchg(25), Oblit-Acc/Dmg/Rchg(36), Oblit-Acc/Dmg/EndRdx/Rchg(43), Oblit-%Dam(46)
Level 26: Ripper -- Oblit-Dmg(A), Oblit-Acc/Rchg(27), Oblit-Dmg/Rchg(27), Oblit-Acc/Dmg/Rchg(29), Oblit-Acc/Dmg/EndRdx/Rchg(29), Oblit-%Dam(40)
Level 28: Build Up -- RechRdx-I(A), RechRdx-I(31)
Level 30: Quills -- M'Strk-Acc/Dmg(A), M'Strk-Dmg/EndRdx(31), M'Strk-Dmg/Rchg(31), M'Strk-Acc/EndRdx(34), M'Strk-Acc/Dmg/EndRdx(37), M'Strk-Dmg/EndRdx/Rchg(40)
Level 32: Throw Spines -- Ragnrk-Dmg(A), Ragnrk-Dmg/Rchg(33), Ragnrk-Acc/Dmg/Rchg(33), Ragnrk-Acc/Rchg(33), Ragnrk-Dmg/EndRdx(34)
Level 35: Fiery Embrace -- RechRdx-I(A), RechRdx-I(36)
Level 38: Blazing Aura -- M'Strk-Acc/Dmg(A), M'Strk-Dmg/EndRdx(39), M'Strk-Dmg/Rchg(39), M'Strk-Acc/EndRdx(39), M'Strk-Acc/Dmg/EndRdx(46), M'Strk-Dmg/EndRdx/Rchg(46)
Level 41: Tough -- RctvArm-ResDam(A), RctvArm-EndRdx(42), RctvArm-ResDam/EndRdx(42), RctvArm-ResDam/EndRdx/Rchg(42)
Level 44: Weave -- LkGmblr-Def(A), LkGmblr-Def/EndRdx(45), LkGmblr-EndRdx/Rchg(45), LkGmblr-Rchg+(45)
Level 47: Burn -- Oblit-Dmg(A), Oblit-Acc/Rchg(48), Oblit-Dmg/Rchg(48), Oblit-Acc/Dmg/Rchg(48), Oblit-Acc/Dmg/EndRdx/Rchg(50), Oblit-%Dam(50)
Level 49: Rise of the Phoenix -- RechRdx-I(A)
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Critical Hit
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Set Bonus Totals:

• 14.5% DamageBuff(Smashing)
• 14.5% DamageBuff(Lethal)
• 14.5% DamageBuff(Fire)
• 14.5% DamageBuff(Cold)
• 14.5% DamageBuff(Energy)
• 14.5% DamageBuff(Negative)
• 14.5% DamageBuff(Toxic)
• 14.5% DamageBuff(Psionic)
• 16.8% Defense(Smashing)
• 16.8% Defense(Lethal)
• 4.88% Defense(Fire)
• 4.88% Defense(Cold)
• 9.25% Defense(Energy)
• 9.25% Defense(Negative)
• 3% Defense(Psionic)
• 26.8% Defense(Melee)
• 8% Defense(Ranged)
• 6.75% Defense(AoE)
• 4% Enhancement(Heal)
• 50% Enhancement(RechargeTime)
• 67% Enhancement(Accuracy)
• 9% FlySpeed
• 60.2 HP (4.5%) HitPoints
• 9% JumpHeight
• 9% JumpSpeed
• Knockback (Mag -4)
• Knockup (Mag -4)
• MezResist(Held) 2.75%
• MezResist(Immobilize) 4.95%
• MezResist(Sleep) 3.3%
• MezResist(Stun) 12.1%
• MezResist(Terrorized) 2.2%
• 11% (0.18 End/sec) Recovery
• 10% (0.56 HP/sec) Regeneration
• 5.67% Resistance(Fire)
• 5.67% Resistance(Cold)
• 9% RunSpeed

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