There is a lot more leniency on a "vs volt" build after the Focus 3.0 rework, this is just what I personally prefer.

• Arcane Nullifier to not lose energy from mag procs.
• Roar + [Holster Amp] to buff DPS (if DPS is running Holster Amp then consider Corrosive Projection as it gives more damage for Zenith on water limbs).
• Piercing Roar augment both to more easily recast Roar and (new with U32) for +range to more easily hit DPS with it.
• High duration for leniency on placing preshields and casting Roar.
• Umbral mods for survivability and strength for Roar.
• Primed Flow + Preparation to conserve energy restores.
• Arcane Energize to further conserver enregy restores (helps DPS as well). Molt [Vigor] can be used instead of a higher strength roar is desired.

Currently have one Tauforged Crimson Archon Shard for casting speed and four Crimson Archon Shards for ability strength. Ideally these would be Tauforged for an additional 20% strength, but it is not really necessary (this already hits 257% strength for a 77% roar buff).