Bosses with molten shell - visual clarity issue

Some bosses in maps spawn with molten shell on them as part of the increased difficulty from atlas boss passives. The buff itself is fine, however visually it could use some toning down.

The issue is that molten shell on some bosses obscures their moves and ability cues, and even though the sound effect is there, it's difficult to see where they are facing and what they are doing, especially if the shell is about to explode.

Maybe make the effect a little less pronounced or make it opaque?