Barb Swipe and lunge are the two most important for a spines. Barb Swipe recharges crazy fast and does good damage, and Lunge is ranged.
I use quills for procs and stalker defense, most ppl think im nuts but when the -res proc goes off, your attacks all do more damage for the next ten seconds, kinda like a free BU.
I play RV, not SC or WB or BB.... so others might have some better suggestions.
You're looking for Impale, not Lunge. 
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"One day we all may see each other elsewhere. In Tyria, in Azeroth. We may pass each other and never know it. And that's sad. But if nothing else, we'll still have Rhode Island."
"One day we all may see each other elsewhere. In Tyria, in Azeroth. We may pass each other and never know it. And that's sad. But if nothing else, we'll still have Rhode Island."
Essentially you'll want to take Barb Swipe/Lunge (not both, usually), Impale, Ripper, Build Up, and Throw Spines if you want another ranged attack (but Laser Beam Eyes can also do the trick in that case.) Quills is okay, but there are better options. If you take Quills I suggest slotting procs to give it a little more deadly edge, you'll need an accuracy check too. Confront is another option, with a fast recharge it can really disrupt opponents messing with your team mates.
In Regeneration you'll want to definitely take Fast Healing, Quick Recovery, Reconstruction, Dull Pain, Instant Healing, Integration, and Moment of Glory. Fast Healing and Quick Recovery are particularly pleasant when stacked with either Fitness Pool or Physical Perfection, and both are proc heaven. Revive is a bad option for PvP - plain and simple, it will get you killed. Resilience is nice if you want to stack it with Tough or some other form of resistance, but it isn't necessary.
I want to make a spines/regen scrapper for PvP. I'll most likely be playing in Sirens and was just curious as to which powers to take. Thanks for the help.