Description:
This is the most perfect build I ever used for [Chroma] cause usually he needs lot of energy to sustain his abilities (negative efficiency) but with this build you get around 150 energy for each energy orb (300 with yellow shards) and plus viral damage for every weapon (and a empty mod slot because of don't use [Hunter Adrenaline] or [Equilibrium]). Combining that with vex armor and you have one of the best weapon specialist warframes in the game with infinite energy combined with a ton of armor and more than 2k HP with constant regeneration (arcane grace).

Archon Shards:
2 Yellow Shards with 50% more energy for energy orbs
3 Red Shards 10% more strength but you could use another

Preferences:
Mods : You could change prime [Continuity] for another mod (could be trascient [Fortitude]) but I prefer duration to not be recasting abilities everytime.
Aura : I prefer [Brief Respite] cause if you lost vex armor buff you can restore the armor bonus getting shields spamming abilities but you can use another.