Vercure is not part of your rotation.

[LunarEmerald]

I usually just use Vercure/Verraise if :
1. One or both Healers are dead.
2. Both are low on MP and my Mana Shift is down.
3. Most of the people in the party didn't know mechanics and eats all AoEs, to the point that number one and/or two become a really likely possibility.

I often notice healers leaving people dead for long periods of time. Even during fights where people easily hit enrage. Maybe we wouldn't have hit enrage if you didn't leave that dps dead for 2 minutes of the fight.

If I see someone dead for like 20+ secs, I'll stop what I'm doing to raise them even if both healers are alive.