Made a Monk Echo Knight, 3 levels of fighter and the rest in monk (Way of Mercy), took the unarmed fighter from Tasha, so not weak at first levels, can give tops 9 strikes at a turn I liked it.
That sounds like a perfect way to play as a "Imp" in 5E. Unless you refluff any of the small races or Fairy and allow them to choose the Tiefling racial feat.
