i think they might overlap, but who knows... also the best shatterguard has got to be scutter, that defense steal from the looped enemies is too good.
good to know omega bloodmist is not gonna stun em for 6 secods only 3 seconds plus 1 frame, also I in my first slagg endless actually got 3 bloodmists and trashed them all for aura, now I know that was bad decision, but +3 mega shattershard fused with base lvl shattershard of the sea is still 800% defense per cast, and a plus 5 mana regen pact.
PS add defense to the pact options, maybe in the central part of symbol