Good Harlequins Allies for Reaper Wager

I am currently building a Drukhari list for reapers wager. I really want to take advantage of running a couple harlequins units in both my normal list and this one so I am looking for recommendations for what I should look into for allied units. My only real constraints are that it’s about 500-750 pts worth and I really want to run specifically the Solitaire because I like the fluff.

Currently have a Drukhari army consisting of combat patrol and boarding patrol units.