How to go about More Involved DPS Rotations.

[Lambdafish]

We need a 4th healer, and we have 1 GCD focused healer, and 2 oGCD focused healers. DoTs work with GCD healing, and could facilitate a plague doctor, chemist, or biologist type aesthetic.
Multiple DoTs with varying lengths, Thundercloud procs to keep timings variable? Healing GCDs used could contribute to the length or strength of a DoT as a return on the lost damage Spell.

YES!

GCD focused DoT healer that may or may not use Mix as it's primary gimmick? Give me CHM square!