These have been mostly units i've used for certain situations. Like Axel for water maps, as an example.
Honestly, looking at this list, it's my usual FE luck. Starting Cavs bad, flier, Myrmidon lady and Mages good xD
Atleast Elbert has his Arrowbane niche, and solid tanking in general.
But aside from Oscar in Path of Radiance, starting Cavs always hit the bench for me haha.