Alchemic Carbine can be used as a secondary weapon or in the backpack to inflict poison for Snake Fang’s crit condition.
Catalyst can also help by applying an extra stack of poison with each hit from Snake Fangs.
Corrosive Cloud can create a toxic cloud that can be useful for inflicting poison on groups of enemies, but Catalyst is usually more consistent, especially on bosses or in biomes with spread out enemies.
Items that have affixes that can poison enemies can also work.
Snake Fangs' teleport ability can be used to easily close distance with enemies, enabling short-ranged weapons such as the Vorpan and synergies with weapons like the Infantry Bow.
Damage over time stacks that are applied directly by this weapon are buffed by the Point Blank mutation.
Affixes such as "+60% damage to bleeding targets" apply to the weapon's attacks as well as the inflicted poison status.
Due to the teleport ability and the fact you can stay in the air if you repeatedly attack with it, Snake Fangs can be used to very easily defeat bosses such as Mama Tick.