The jump in grit, between the DMT coarse grit (45 micron diamond) and the ceramics (Spyderco medium & fine) is a huge leap. Odds are, you won't get a mirror on your edge unless something in between eases the transition. The scratch pattern from the coarse diamond will be a LOT of work to clean up with the Spyderco hones alone, which aren't nearly as aggressive as the diamond. A DMT fine & EF would help clean that up, and going through the DMT EEF wouldn't hurt. Then follow with the ceramics, and stropping with 6/3/1 micron diamond paste, in order, would also help. Keep in mind, this is for a 'true mirror' finish, or at least as close as you can get. You can still put an excellent cutting edge on a blade with much, much less.
For a 'true mirror' finish on steel, the grit progression really needs to be very tight, with the smallest possible gaps in between grits. Otherwise, there'll likely be too many coarse scratches left on the steel, for finer grits to sufficiently erase in a reasonable amount of time. If trying to mirror-polish one of the very abrasion-resistant supersteels, it'll take even more time & effort.
Edit:
Diamond cuts much more aggressively than the ceramics, and the 'grit' standards are completely different between the two abrasive types. For example, to approach the finish left by the medium Spyderco hone, you'll likely need to go as far as the EF or EEF DMT, before transitioning to the medium ceramic.
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