Guild Wars 2

So I’ve been messing around with Staff builds in SPvP for a while now, mostly pure glass berserker just for funsies, but I figured I’d try something more stable to finally get comfortable with. Starting with the MetaBattle celestial staff build and just making a few changes here and there, but I just can’t seem to decide on a heal skills. I already know the merits of Ether Renewal and Signet, but Arcane Brilliance kinda got my attention. Without any targets hit, it is very subpar healing wise, but having a heal that is also a blast finisher seems to add a nice amount of strategy to it. Can get a massive heal by switching to water, dropping Geyser then AB. When the water blast isn’t really needed you can get Might, Frost Armor, or Swiftness instead in addition to the heal.

Basically, is AB useful enough to replace Signet or Ether Renewal, or does it fall too far behind due to conditions, lower burst and no passive healing?