I mean, yes, and no. Presumably Baal is aware of the kind of power it would have taken to actually break through that barrier. Someone randomly using Sullivan-tier magic because of a special artifact is pretty much beyond prediction and not the fault of Kirio who otherwise executed the plan perfectly fine. I also think that even if Kirio isn't necessarily super powerful himself, Baal sees him as one of the ones that have truly returned to their evil origins.
@mireaderc Well, they were mainly there under the instruction of Baal, one of the prestigious Thirteen Crowns. And it seems as if Kirio is Baal’s right hand man.