i use the magnus 3 sided fixed blade, stinger, and they are like a hot knife through butter.
they are easy to sharpen as they are placed flat and sharpened on 3 sides. i have 5 of the first 6 that i bought, and use them on everything, even target practice..i only ruined one when i shot at a 6X6X6" cedar piece of scrap and it bent it. the other 5 have been through the wringer and sharpen up like new.