Not an easy question to answer. Commercial knives are sharpened at an angle to the stone varying from 12.5° to 22.5°. This means the combined angle at the cutting edge is between 25° and 45°.
I sharpen my knives at 13° (total 26°) this works well for most purposes. I tend to go from the point of view that "if you want to cut, get a knife, if you want to chop get a hatchet or ax, and if you want to pry get a pry bar. That being said I increase the angle only a few degrees for a camp knife/tactical knives. I usually sharpen everything to 13° then test cut/chop under the conditions the customer specifies. If I get chipping or any other edge damage, I resharpen at a slightly higher angle and retest.
So what I suggest is you pick an angle, sharpen the blade to this angle, then test. Adjust the angle based on the test results.
Jim A.