Notes:

Aura is personal preference. [Corrosive Projection] is nice, though [Brief Respite] (with [Augur Reach]) allows you to refresh your shield gate (with a Decaying Key) by casting your 3 (which you'll do often).
With minimum duration and high strength, Hideous Resistance gives 38 changes with maxed Molt stacks. This makes [Primed Sure Footed] less useful since HR protects against all status effects and 30+ charges tends to last a long way.
[Reactive Storm] is basically busted.
Molt Augmented is because [Baruuk] loves strength.
Arcane Strike for getting more strikes out is preferable to any Arcane

Shards:

5 Crimsons for Ability Strength (if you want more HR stacks and Daggers), otherwise max out melee crit damage

Exaulted Build