Post by cloudp
Well... I don't see why you would ask this, but to a private server. I'll give the benefit of the doubt and assume that's not the case, and answer anyways.
Discipline would look for a balance. You would need around 130 spell penetration for a hard cap; if you have access to Wrathful weapon/offhand/Wand, you wouldn't need to gem much more than 1
Stormy Majestic Zircon. If you don't have acess to offhand/wands, gem blue sockets with that.
Haste is a suberb Discipline stat. At end-season 8 levels, you'll want your casts running as fast as you can for nuking. As a support dps, you fit best at bursting with Borrowed Time-Penance, Holy Fire, Smite/Shadow Word:Death finisher, and you want to pull it off in a CC-timespan. Yellow sockets (Assuming, once again, Wrathful-levelled gear. Survival being a fairilly minor issue, with ungemmed resillience of around 1100.) would go with either
Quick King's Amber or
Reckless Ametrine. If you're below the hit cap, consider +20 hit rating gems. (Not link since the color changed to bluein Cataclysm.)
Red sockets would go with Runed Cardinal Ruby (once again, no link) or
Reckless Ametrine.
If you want extra survival, gemming some
Steady Eye of Zul is fine too.