Before I thought it was a technical limitation, but with the mk4 chaxe (I was calling it the 6 earlier, my bad. Damn Roman Numerals!) they showed off that they can change what the first attack off of an activation is. So ideally the Crucis (and maybe Ironhelm?) would get that.
Thunder Hammers atm have very clunky design choices that don’t mesh well with how the game works right now.