Why sharpen them? After they've been used once, you toss 'em in the river and get a fresh one for the next victim
I used to use a standard wusthof steel and a stone to finish it off but I picked up one of those wustof 2 stage V sharpeners. A bit on the lazy side but it works awesome. That's for the chef knives. My spyderco has never needed to be touched in the 25 or so years I've had it and it's been used and abused.
Stone! Knife sharpener accessories seem to be kryptonite to some folks I've worked with. Seriously, I watched one dude slice his hand from in between his middle/ring finger almost to his wrist..thankfully this was just in training.
I have a similar 2 stage sharpener from Smith's with one side carbide and the other ceramic. It works ok, just seeing what else is out there. And I'm lazy.
Depends on what I am working on. I have a Lansky that is used mostly on folding knives and small sheath knives. I will also use it to reset something that has bee really abused. For bigger stuff (mostly the kitchen knives) I have assorted wetstones from about 150 grit to around 3000. I also keep a steel right next to my kitchen knives for daily tuneups.
Before spyderco made knives they made the sharpmaker and still do. Cheap and gets knives quickly, easily and repeatably sharp. After that something like wicked edge pro if u have money, paper wheels if u have a grinder are faster again but be careful, Japanese wetstones if u have the skills and inclination and stropping for a razor edge if hair popping sharp isn't enough and you have nothing better to do. On the knife forums this qn might be equivalent to which oil should I use.
Big two sided diamond stone to get the edge to the angle I like. Then 1k and 6k Japanese stones to sharpen and hone. No guides. Just sit and grin like Pyle from FMJ.
I was gonna say something about multi-angles but I don't have nice enough blades to merit that amount of attention. I just run an AccuSharp down my blades but they're nothing to write home about...and you don't want to use one on a good blade, the carbide bits shave metal off. Machetes? All day long. My little Buck 110? Yup, that gets it, too.
Razor's Edge... the founder was on the old Bandit mailing list back in the late 90s. Guy was Orvis' age and was building a turbo Bandit 12.
Work Sharp knife and tool sharpener. It seemed reasonable enough on price and it's absolutely retard proof. I even changed the belt and got my lawnmower blades back in shape.
This is supposed to be a reallly good system. Maybe Broome can get one... https://www.wickededgeusa.com/product/generation-3-pro/
I just looked up the Lansky system and don't understand how it maintains the correct angle. Seems to me that different sized blades sharpened with the same setting will get sharpened at different angles. I'm looking to buy the Ken Onion Work Sharp sharpener since it's most similar to what the professional sharpeners I've been to use. You people that sharpen with a stone must really have nothing better to do with your time.