Spines/regen has always been one of my favorites, it was also one of my first handful of 50s on live.
This build really works well for me. the biggest thing is to keep up with IH, and for big fights pop Dull Pain before going in so you can be at the HP cap.
Majority of the time though i just use IH and reconstruction as needed, saving DP in case i just randomly get hit hard.