Completely agree with @mad_lee propositions and suggestions.
The set terribly lacks damage, AoE, some resists.
It should be also fine adding +% phys/trauma damage on proc add ADcH on it instead of regeneration.
Also, pierce/bleed resists on belt may be replaced with sth more useful, like aether/elemental.
Attack speed. Increase it on weapon at least to 16%.
video from SR
https://www.grimtools.com/calc/YZeoBlQ2 - the build I utilize now. Went to Oleron to have at least an AoE.