First off, in late Stories of Legend and even some of the easier Uncanny Legends stages, Jamiera Cat is most useful as a defense/meatshield type cat than for his power. While his damage might pale in comparison to other reliable attackers, his singular knockback allows him to hold the line for quite a while. Unfortunately, unlike early-game, his role as an attacker is done better by other non-uber and gacha units, such as Dragon Cat, Manic King Dragon, Paris Cat or Drama Cats; he also faces competition as a generalist tanker from Zamboney Cat and Roe Cat, not to mention other alternatives.