You don't take Spine Burst for PvP other than that it looks ok, though I'd go with Haste and SS instead of leaping.
World of Jackcraft.
Jack, I'm building a Spines/Regen too. Did you find that you picked up travel powers relatively late in your build? I have found the flexability in the build quiet limited. For example; I'm nearly 16 so I want Integration, 18 will be Quills, 20 will be Stamina and 22 might be going back for Dull Pain or another attack if one is unlocked then. If so I might be a pedestrian until lvl 26 or 28! 
So Hobo, you're telling me to swap CJ and SJ for hasten and SS? Yeah that sounds ok, but what should I replace spine burst with? If I only have 3 attacks can I run an attack chain?
- @DSorrow - alts on Union and Freedom mostly -
Currently playing as Castigation on Freedom
My Katana/Inv Guide
Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either. -Einstein
Animal - Yes it's very tight, but I always go for Travel powers quick, thing I normally put off till late is Resilience or Quills (I don't actually have Quills in my build at the moment).
Avenger - You'd be better off with Barb Swipe to be honest, which is terrible, but if I were to drop Spine Burst I'd go into either Leadership for the +perception (means dropping Stealth too) or Fighting for Toughness (Also means dropping Stealth).
Leadership would be better. BTW I wouldn't reccomend a Spines Scrapper at Bloody Bay, all you ever do is Impale and Lunge and that's just poo. Better off in Sirens or Warburg.
World of Jackcraft.
I'd forget Stealth for PvP nowadays, since everyones involved in an arms race to get the most +Perception possible.
I'd forget Stealth, get Invis and Grant invis instead. You can still stay out of the way better with Invis than without it. But a Spines Scrapper doing so? PAH!
World of Jackcraft.
So this toon will mostly take on villains in Bloody Bay, that's why the low level. Might take him higher later on but now he's planned for Bloody Bay
Exported from version 1.5C of CoH Planner
http://joechott.com/coh
Archetype: Scrapper
Primary Powers - Ranged : Spines
Secondary Powers - Support : Regeneration
01 : Fast Healing hel(01)
01 : Lunge dam(01) dam(7) acc(7) acc(15)
02 : Reconstruction recred(02) recred(3) hel(3) hel(13)
04 : Quick Recovery endrec(04) endrec(5) endrec(5)
06 : Build Up recred(06)
08 : Impale dam(08) dam(9) acc(9) acc(15)
10 : Dull Pain recred(10) recred(11) hel(11) hel(13)
12 : Combat Jumping defbuf(12)
14 : Super Jump jmp(14)
16 : Integration hel(16) hel(17) hel(17)
18 : Quills acc(18) acc(19) endred(19)
20 : Spine Burst dam(20) dam(21) acc(21) acc(25)
22 : Barb Swipe dam(22) dam(23) acc(23) acc(25)
24 : Stealth endred(24)
-------------------------------------------
01 : Brawl Empty(01)
01 : Sprint Empty(01)
02 : Rest Empty(02)
- @DSorrow - alts on Union and Freedom mostly -
Currently playing as Castigation on Freedom
My Katana/Inv Guide
Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either. -Einstein