Since this is the cheap version, that rank 10 mods are rank 8 as that is one of the best tips for newer players low on endo & credits. If you get them all maxed out just add a Madurai polarity( the V shaped one, for transient fortitude)
Alternative to using Nullifier can be Grace(if no operator healing) or Velocity(increased DPS)
Only missing Toxin, which you can get on your archgun or on [Arquebex] if you have [Voidrig]
Shared Polarities across all builds (only difference is here, for the sake of a cheaper alternative, some polarities are removed)