Renault (FE7) vs Shiho (VP1): Easily wins. Renault has a 6HKO with Divine (Shiho doesn't double him even with that, you need to be above average speed) and 10% crit. Shiho can heal once every four Renault attacks, but in order to make headway she'll need to attack once herself, triggering a counter, so Renault gets 5 attacks in. If one of those crits the total multiplier is 7. Even if you cut effective crit rate in half, Renault still has 5%, which means he has a 23% chance of getting a crit every cycle. Shiho doesn't do well when her opponent has a 23% chance of doing anything, given how long the fight is.