This is...(for the part that matters), just simply not true. The feat that we used for the longest time to get the strongest characters to 7-A (
before that calc was thrown out) and is now accepted as being Low 7-C
here is derived from Adam, whom is currently accepted as downscaling from Lucifer, splitting the Hazbin Hotel. It's quite clear from the scene that this was absolutely
not a "casual" feat by any means. Adam was getting visibly infuriated at Lucifer toying with and mocking him, was cussing him out veraciously, and then
with a bruise on his face and a bloody nose shouted as he used both of his hands to fire what is clearly a full powered blast of holy light from his hands which accomplishes this feat. It does not matter if any of the other feats beneath this are casual when the highest rated one is not. If a top-tier's highest feat is Low 7-C, then a sudden jump of orders of magnitude by at least a billion times (probably higher, but you get the point), then that absolutely qualifies any Tier 5 feats as an outlier. But anyway, this is not the sole issue with the Might of Lilith or characters scaling to it, anyway.