Augmented witching robe, off the top of my head. Amalric HQ (lol) I think. Both are difficult to obtain.
I agree though. While some is very good/best for certain features, Ambu is the new entry tier. Making it obtainable periodically is silly.
A friend came back during Sulevia's and I dragged him through 15k points so his PLD had something, while he got better, and his DRK had fair gear.
Had he come back two months later: sorry for your luck (really mine, since I was carrying him).
Yeah, it got replaced but that's the point of most ambu gear, and some of it IS best in slot.