Helminth: Elemental ward (toxin) for guns of wrathful advance for melee
Elemental ward (toxin) provides swap damage while also giving a massive boost to reload
wrathful advance - obviously extra crit (even with 100 strength it gives 100% crit)

Archon shards - Dealers choice to make ur build convenient

This build will make u tanky as all hell with ur redline and kinetic plating up..... but u changed ur mach [Rush] how do u build the redline meter?
simple theres 2 methods use ur melee while moving Or Just use cold thermal sunder a few times to freeze enemies which builds redline meter BUT also stops them hitting u which can drain ur meter if kinetic plating is active.

To armor strip use ur thermal sunder heat 2x while in red line

Flex Slot the only slot i could recommend replacing is [Archon Vitality] if you want to keep the swap mechanic to increase weapon damage output by 260%
if not then u can freely change vig swap and [Holster Amp].

A good weapon to use would be [Torid] incarnon as the beam mode benefits greatly from the increased fire rate from redline and if u quick swap by double tapping f u get 260% damage for a couple of seconds which is enough to drain the incarnon meter by half.