Especially considering how much we do other than just healing. A Paladin might consider stacking in some +heal gems because all they do in arenas is spam heals other than HoJ on its 1m cooldown, BoP on its 3m cooldown or Bubble.
Priests on the other hand are really great for Mana Burn, Mind Control, Fear, PW:S. PoM doesn't get a ton of benefit from +heal and that's one of my main heals in PvP. Renew gets a lot of bonus so that's nice, but overall I'd say survival stats take priority over healing stats.
All my arena teams other than 2v2, I'm backed up by a Paladin who is essentially the main healer. As such I gear to better suit my broad range of responsibilities.
Priests on the other hand are really great for Mana Burn, Mind Control, Fear, PW:S. PoM doesn't get a ton of benefit from +heal and that's one of my main heals in PvP. Renew gets a lot of bonus so that's nice, but overall I'd say survival stats take priority over healing stats.
All my arena teams other than 2v2, I'm backed up by a Paladin who is essentially the main healer. As such I gear to better suit my broad range of responsibilities.