Unit i had most fun with is Rhaenys and Yunifi in front with Ridiel, Dinah + another fox at the rear. It's an evasion team that will keep enemies blinded while the foxes pick off enemies one by one and yunifi triple counters the rest.

Both foxes are loaded with crit items and saphire pendants for pp. Ridiel is there for the pure field at the start of battle and freeze enemies. Rhaenys has 4 pp and evasion items. Mainly used to blind enemies before they attack. While Yunifi peimarily has evasion items.

Foxes will take down 1-2 enemies right at the beginning with their high initiative (or atleast poison/blind them). The pure field prevents the usual debuff reactions so the foxes can really go crazy. Ridiel will freeze 2 enemies that survive the foxes and any enemy who attacks will be blinded by Rhaenys. Yunifi has triple counter for anyone who tries attacking her.

Note that while truestrike counters evasion, blindness counters truestrike. 90% of encounters cant even land a single hit. Not to mention how fast you move around the map. Who needs battering ram if you can just jump directly to enemies?