Tossing an aero here and there

[Ghishlain]

Since the question was for Endgame, mainly Ex primals and Coil, he won't have it for Coil 1-5 nor Levi Ex. I've tried DPS as WHM before (even using some Astral accessories that had accuracy already on them) and noticed many misses in T2

Ah, I missed the bit about specifically end game (me reading much too fast). Having not done Levi EX, I can't vouch for how accuracy is like in Levi EX, but for the other EX primals, accuracy won't be an issue. I've personally found my accuracy better in T4 than T2 because I find T4 is more of a "kill all trash possible" pull versus the boss gauntlet of T2. I have noted an irritable amount of misses in T2 but not so much in T4. In fact, once I stabilize my tank in P2 and P5, my DPS adds quite a significant margin of damage to the Soldiers. I can count the amount of times I've missed Energy Drain on the Dreadnaughts in a single hand over the course of 15+ runs of T4 too.

Mileage may vary depending on player and play style, DPS if you feel comfortable but don't lose focus on the main goal of a healer, especially in content designed to trash people, hard.