I sharpened only a few D2 knives, so take my opinion with a spoonofsalt. My hair whittling durable edge progression:
DMT XC -> C -> F -> EF -> EEF -> 1micron diamond/cbn -> debur with EEF -> 0.5u diamond/cbn
-> deburr with EEF (very very light touch) -> 0.1u polydiamond -> finish on plain leather.
I put 'durable' because lack of highly polish finishes, D2 lose its edge really fast. OK, in the past I sharpened D2 with waterstones the whole way through, edge gets sharp but dull very quickly (way below an acceptable working edge level).