Injustice 2 Mobile - Upgrading Predator Batman to 7 Stars

Before the introduction of raids, Predator Batman was one of my favourite heroes in this game. He has very good specials, and is painful with his attacks. His tagging in also does percentage damage to the opponent's team, which is really, really awesome! Unfortunately, this passive (HIS ONLY PASSIVE) doesn't work in raids... Prior to upgrading to 7*, I would only use Predator Batman in raids on adhoc basis. Perhaps now I should use him more often, as his damage is higher than my current 6* AKBM, and his Sp2 has longer stun duration when upgraded. Predator Batman remains as a high tier hero in my opinion, despite the introduction of new heroes and game modes.