For use with an external source of Viral(CO Primer) and Combo Duration (like the Dexterity Arcanes) vs extremely tanky enemies like Demolishers in Disruption.

2/4 Infested Demolishers are immune to Toxin damage, so use Heat vs Infested (165%Tox->90%Heat).

Guide: https://docs.google.com/document/d/1onAkuumVeMJFyv5TpF3uVeXeaKcNFPo1WB09iJSZuSA

Riven stat priority: Range ? CD = AS > CC > Dmg
Range is a great stat for melee, but doesn't bring a quantifiable damage increase, hence why it's "?" in relation to the others.
Riven replaces mod with same stats. If it has stats that can replace 2 mods it can allow space for Primed Reach.

Meta builds for melee and the rough lvl-range where they perform best:
Burst DPS - For lvl0-100.
Sustained Slash DPS - For lvl100-2000
Sustained Toxin DPS - For lvl2000-9999