Farming plan

Master Thief

Dropped by

Deimos/Formido (Caches), Rotation C Rare 3.76 %

Another Betrayer, Rotation C Rare 2.01 %

Family Reunion, Rotation C Rare 2.01 %

Hot Mess, Rotation C Rare 2.01 %

Recover The Orokin Archive, Rotation C Rare 2.01 %

Sunkiller, Rotation C Rare 2.01 %

Table For Two, Rotation C Rare 2.01 %

The Aftermath, Rotation C Rare 2.01 %

Time's Up, Rotation C Rare 2.01 %

Chroma Uncommon 0.6 %

Chance of getting it by number of runs

Each run has a 3.76% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.