Distant Counter and Vengeful F. candidates

Any unit that you'll be max merging. Distant Counter Vengeful Fighter, in my opinion, is a waste of fodder on units that you either don't like or aren't gonna attempt to max merge.

Zephiel, Joshua, mergued +10 OC Eirika, OC Ephraim are all heroes who I gave Distant Counter to.
Zephiel is a really good option thanks to his refinnement.

Vengeful F. is also good on DC Zephiel, or every armor hero focused on enemy phase (for my Vengaful fighter is better than other Fighter skills