I just don't think Shavarath should be the content that care specifically to DC-based stuff. Since ToD was released, Shavarath was the place where DC-based tactics (spells, stuns, etc) was harder to land by design.
I will be ok with that if we had pack were melee and ranged struggle like DC caster does in shav.
I don't know a single quest were melee/ranged dps is not working well.
Maybe add to shav effect mob are immune to mortal fear, no? Looks fair to me.