Mike, generally the way this works is, the bigger the angle, the more metal there is behind the edge, and that makes the edge stronger. On the downside, the more metal behind the edge, the harder it is to push that metal through the material you're cutting -- that is, the lower the performance. The sharpening angle you choose should therefore be the lowest angle possible (for highest cutting performance), but not so low that the edge becomes too weak and gets damaged. How weak is too weak? Well that depends on the blade itself, and what you're doing with it.
So, how much performance can be realized by lowering the edge angle? Quite a bit. Years ago, I wrote a post (it might be stickied around here somewhere) about a Benchmade 710 that I performance-tested out-of-the-box, then re-sharpened it by hand. The results? My hand-sharpening resulted in a 1-to-9 performance gain, that is, what took me nine cuts to do out-of-the-box, I could do in one after sharpening it properly (and that included drastically lowering the edge angle).
Your Lansky's preset angles are per-side. 25 degrees per side is maybe what I put on my axe. For a fixed blade or folder, way WAY too obtuse, you're leaving a ton of performance on the table. Realize that now that you've sharpened to that angle, it might take a while to re-profile all that steel away to get to a higher-performing edge.