ummm, the WSG staff is actually a good/viable option for priests in the 39 bracket, so dunno what youre talking about. Sutarn's Ring isnt bad either, although with the current state of Spirit the deathmage is slightly better imo. Also, beyond the obviously retarded aquamarine ring, youre missing hit on gloves (hit is win, dont believe me?) and int on your weapon...the int on the wep is particularly interesting since you claim you are "mana pool focused." Youre close...but not quite there.
There are a lot of good gear options...optimal might be something like
Head: Miners Hat, Eagle Lens, Int Lens, Papal Fez, Embalmed Shroud, Whitemanes Chapeu/Owl Lens.
Neck: Necklace of Calisea
Shoulders: Instance shoulders of the Eagle or Sorcerer
Chest: Robes of the Lich or Robes of Crystal Waters with 6stats, Deathshead Vestment if youre a boss.
Bracers: Bloodband Bracers or Eagle Bracers with 12int or 12stam depending on how you want to gear
Gloves: Revelosh Gloves of the Eagle with 15hit
Belt: Deathmage Sash
Legs: Necromancer legs, or Rainstrider or Blighted if youre amazing
Feet: WSG boots or the cool green ones if youre horde 12stam
Rings: 2x Tumultous Ring of the Sorcerer imo is bis, UW bands are still good tho.
Tons of trinkets to choose from, AGM is a good one to get tho and obv insignia if youre not human. JC and Alch offer interesting trinket options if youre not into engineering.
Wep: Dignified Headmasters Charge with 22int is my fav, but lots of options here including WSG staff, Staff of Jordan, 1h mace with a variety of OHs to choose from are cool too. Int chants on wep are best overall imo for priest...although if you end up with multiple weps its fun to have multiple enchants.
Wand: Jaina's Firestarter or Ember Wand of the Eagle
SP is vastly overrated by a lot of priests.
You can armory my priest
Lunarsoul on jaedenar, but hes got a silly spec/gearset on atm, lol. IMO just get ALL the possible priest gear and pick and choose as you go...my bags are full, are yours?