Raw Damage best used with armor strip in very high levels.
Can use Corrosive instead of Viral if not armor stripping.

EVOLUTIONS

Evo II: Hoplite Virtue - +dmg and +dmg from shield break for 8s
Evo III: Personal preference - Ready Retaliation gives quick reload AND transform speed, but lex talionis gives free -80% recoil which stacks with steady hands to give zero recoil
Evo IV: Critical Parallel - Increase base CC to 54% and CD to 3.4x

MOD BREAKDOWN

Galvanized Diffusion - mandatory for multishot giving 3.3 final multishot
Galvanized Shot - for base dmg +120% every status. After just three statuses we get +360% dmg.
Galv Crosshairs - boosts CC
Primed Target Cracker - boosts CD to 7.1
Viral 60/60 mods - Modded viral status boosts all damage to health,. Lex Prime has a high base status chance of 44%, with a final SC of 132% after Galv Shot and Virals. This means with 3 multishot, you are getting approximately 2-3 viral procs per shot. This boosts the damage of heat procs and subsequent damage.
Primed Heated Charge - big elemental bonus
Lethal Torrent - firerate and multishot. [Anemic Agility] is optional.