It's always been a situational spell, though. I currently run it, but I'm almost positive i'll be taking it out as I just don't use it much. Not to mention you certainly don't want GRE's vulnerability acid to spread, heh.
The problem is you're investing 40 Nora into something Constructs as a theme is designed to PREVENT: a Construct dying. Mason, Repair, Superior Tinkering, Build 'Em Tough, Boost, ALL of that says 'Survive!"
