Mods:

[Equilibrium] could be replaced by 2 purple archon shards if you want an additional mod such as [Augur Message], [Constitution], [Gladiator Finesse], [Umbral Intensify], [Primed Redirection] (enables [Reinforced Bond] + gives 180% melee damage with melee retaliation), [Vigorous Swap], [Catalyzing Shields]
Exilus is flexible for [Primed Sure Footed]

Arcanes:

Arcane [Fury] for melee damage.
2nd arcane slot is flexible, good choices include Arcane Aegis, Molt Efficiency, Arcane Blessing

Archon Shards:

Violet melee crit damage
Amber cast speed, violet [Equilibrium]