Only works for the completed set. I used the completed set only for the last fight in act 1, so it was really unnecessary.
May I ask why?
Was it because it was too late in the chapter? Do you lose everything by the end of act 1, you get better gear right away at the start of act 2?
I've gotten the chest and the head pieces and both are a rather nice upgrade, but in order to get the legs I need to dump 2 levels worth of attributes into Wits, and I am not sure it is worth it for just one fight.
Thanks.