Quote Originally Posted by CKNovel View Post
Allow me to explain: both healers will get res debuff which will reduces their healing output and shielding capabilities.
On top of that, both healers will play on a low mana pool.

In 24 man alliance a tank can heal the party
The healing needed is so low both healers can throw their oGCD regen and it will be enough.
In raid such as savage/ultimate, there's little chance two healers with res debuff can keep the party up unless there's little raidwide going on.
Usually tank invuln are mapped for a specific situation (see P6S&P7S for example).

In comparison, 10 battery is:
-24 potency on each arm punch
-48 potency on roller dash
-68 potency on pile bunker
-78 potency on crown collider

Even for 10 battery, the cost piles up very fast.
And consider this is a resource you spend on burst window, increasing the loss.
In ideal conditions and high-level raiding, yeah sure. This would not be for parsing or progress (except maybe to see mechanics after a wipe is guaranteed lol). In a casual alliance raid where people are messing up mechanics or low-end raids and trials it could mean the difference between a wipe and a clear. More rez options may serve to keep all alliances alive if people muck up mechanics. It'd be an "oh shit" option, not an optimal use one.

Not everything has to be for high-end raiding.