Thanks. I'm going to have to read up on that tool. I tried a quick test using 10 scales starting at 5 and going up by increments of 10 to 95, so 5-95. Left most things default and created the xml. I loaded that into the tile cache tool and ran it and it created a cache but when viewing the tile cache in Pro, the tiles stopped showing after zooming past 1:25. I'm assuming to get this to work on this large of scale I'll have to mess with scales and tile sizes and such.
So if I create my own tiling scheme and levels and create a cache, in theory I can create a tile package from that and it will still work in AGO even though it's not in the AGO scheme? Since my intent is to have this be in a web map it wouldn't make sense to create my own tiles/scheme and then not be able to use it outside of desktop software.