Interesting. Renegade runes recommended. Also, why does thief have like 5 different build benchmarks? From what I have been reading here Power Reaper and Power Scourge are around where the low end Thief benchmarks are. I'll never understand why people take these guys as gospel. Discuss.
Edit: Also, they tested Firebrand with Viper because the tester was too poor to get Grieving and does not have Legendary according to their reddit posting.