Since he didn't pick crusader strike I assume that this spec is played in holy gear with one hand and shield.
Dmg comes probably from SoR and judgement.
I guess that the extra strike from reckoning can also proc AoW so this spec can probably heal quite a lot with instant flash heal.
Apparently I was wrong.
Today I saw a paly in ret gear with one hand and shield using a 0/28/43 build in arena. http://armory.warmane.com/character/...ecrown/talents
He was playing 2s together with a Awarr and they beat Qwneer twice who was playing Awarr/Hpala, both BiS geared.
I tested this hybrid build on Blackrock and have to say it's pretty strong, esp for duels.
Due to http://wotlk.cavernoftime.com/spell=20182 and http://wotlk.cavernoftime.com/spell=20198 you deal more dmg with one hand and shield than a ret paly does and because of http://wotlk.cavernoftime.com/spell=20182 you also generate more AoW procs.
If you are BiS geared with a few agi items that boost your crit chance then I guess you can pretty much spam instant flash of lights on every GCD as long as you melee the opponent.
I think this hybrid build is better than ret against some arena setups.
Quick facts about this spec, you don t need 5 talent points for SoR improvment , i would rather go with 3/5 Reckoning and , 3/3 One-Handed Specialization also having equiped 1 handed weapon you're attack speed it' s gonna be around 1.8 (bis weapon 1.71) i suggest using off parts with haste , try to lower your attack speed, about seals you can chose between SoR or SoV( with pve Libram) why? you don t need anymore the FoL Libram since your heals are already preatty strong and also more AoW proccs. About rotation Judgement , Shield of the Righteous and guess what? Consecration! At this point there are 2 guys using this specc succesfully in 2v2 around 2,3 i don't have the time to try it out in arenas myself but i assume it's viable , about duels you can beat any melee class , Judgement spell damaged i would say it's 25%-30% stronger then ret's.