You cut the racial enhancements if you aren't a racial completionist.
This build always pulls ahead of 20 Ranger and the other class splits tested in the guide regardless of racial past lives.
I wouldn't run this build solely for heroic leveling. Fire sorc is way better for racial past lives. If you need a rogue past life, I'd go 17 Rogue/2 Arti/1 Barb Inquisitive and run R1 from level 4-20.
I've shared the model and all the numbers that plug into it.
Success in R10s goes way beyond a build. It's about skill, quest knowledge, party makeup and team work. I've played in static groups with this build where we steamrolled everything at run speed, and then I've 4-manned R10s with one other DPS, a tank and a healer where it was a slog.