Elementalist gear question
Most of the time if you’re running in an organized raid they typically have organized raid builds they want you to use. These builds are chosen and usually decided upon for what’s most useful for their Commanders and most Commanders will expect organized people to be playing those builds. I would always strongly suggest using whatever build they expect to support your commander.
As to the question of stats, generally speaking the only stats that matter are direct damage (power/precision/ferocity) and survivability stats (toughness/vitality).
Condi damage and Healing generally aren’t useful in large scale scenarios. The main reason for this is the amount of healing we can kick out is vastly inferior to the amount of damage being dealt in large scale scenarios. Even if you could double healing on skills like Geyser it’d still be nothing compared to 4+ Guardians/Warriors AOE blasting with Hammer on the water fields. Conditions suffer from low up time as many classes bring a large amount of condi cleanse from the Guardian’s Purging Flames to our very own Healing Rain and mostly see usage in smaller scale PvP scenarios (solo roaming WvW, SPvP) where condi removal isn’t as abundant.
Therefore Celestial “wastes” points in the less useful stats that could be focused elsewhere. Doesn’t mean you can’t make these stats work, but this explains the viewpoint why most people use Berserker. Well that and it is very commonly used for PvE and if you’re talking Ascended Armor that can be quite spendy to make multiple suits!