Diamond plates and Spyderco benchstones dampened with Simple Green cleaner.
I used a set of DMT's for years, but I've gotten better results with the Amazon type diamond hones lately.
I maintain apex with Spyderco Sharpmaker.
On large Busse/Kin <R9 up to 1311> I've had better results clamping the blade and using the hones like a file-- with a very light touch.
I've used a cheap HF 1x30 but I given up on it because it's very noisy, dusty, and jittery.
So, I'm a diamond + ceramic guy, equally. I voted "ceramic" because I couldn't choose both.
Only drawback, I'm not a fan of that diamond dust & swarf-- nasty stuff-- be careful.