General Use [Koumei]
Does excellent work with controlling groups of enemies while still doing some decent damage.
The biggest hurdle to overcome is the starting energy which I overcome with a Grimoire and/or my operator using the Zenurik tree. I also include Arcane Energize as another alternative which also offers some team benefits as well. Once you start gaining energy there aren't really any issues maintaining enough for using your abilities regularly.
I chose to use the Augur mods for their low cost, the benefits to the stats that I wanted to maximize without any negative effects, and are flexible for any other mods that would fit your playstyle better!
I would put 5x Tauforged Crimson Archon Shards for more ability strength. This further increases the damage on the 1st and 4th ability, and the healing done from the 3rd ability. Also increasing ability duration could be another good alternative.
Arcanes are pure preference with what you would like. I always like to run Molt Augmented at the very least.
I like each of the abilities and how they work together, I wouldn't infuse any subsumed abilities. I always try to keep my 3rd ability up, and work towards more decrees from the 2nd ability throughout the mission. I mostly find myself using my 1st and 4th ability to maintain crowd control and do damage to enemies at the same time.