I don't think Ambuscade really needs to add any new gear, other then maybe waist pieces would be nice. Augmented Waist pieces would be great since many of the best waist pieces are in awkward outdated areas that most can't solo like vagary, woe lvl 120, incursion

It takes a lot of grinding to get 4 or more jobs done with capes, so to me this is enough right here. There is always a benefit to doing ambuscade even if you got all the gear and cape augments. Lots of HMP and other valuable items to gain for profit just for helping others.