[Convectrix] is one of the best primary when it come to deal with high armor enemy. With Slash proc does true dmg, which go straight to health and ignore armor.

To boost the slash proc, I use viral and primed cleanse. Unranked viral because the augument [Efficient Beams] will provide enough status chance. Faction mod is necessary for any DoT build

[Blunderbuss] is not a good crit chance increase mod, but easy to access. You can replace it with [Laser Sight] (require aim), [Critical Deceleration] (need external fire rate) or [Motus Setup] (require bullet or double jump), or [Critical Deceleration]. [Motus Setup] would be the best here since it provide extra sc, which is boosted again by a lot of ms (only in beam weapon)

Say NO to [Sweeping Serration]. It doesn't increase slash proc dmg at all ==> waste a precious slot

If you want a riven for this gun, multishot are the most important stats. Other stats that is nice to have on riven is ms, sc, fr, cd (cc also good if you dont like [Motus Setup]).