I'm sorry but your knowledge on T'Challa is severely lacking if you think his intellect falls off when he's not in a team Book. Read his solo's and you will see why that's not the case. He is not like Batman at all. He has consistently made a career out of taking out opponents above his weight class in teams books and solos alike. Read Priest's Black Panther and everything you have seen in Ultimates nakes plenty of sense, if anything maybe even still a little bit downplayed in how well and deadly T'Challa's prep capability is.