It's a very odd build because it has no real focus. It has two skills that are primarily melee, so what you are saying is correct. Plus there are few synergies with CK and RS (normally you want some crafting skills with either). They do partly synergize with each other, but by late game, if one or the other is your primary offensive skills, you want them to be as good as possible. That said, not all builds are about being as strong as possible. Ask anyone who plays with random or themed builds. Sometimes you are doing it just for fun (which is what it sounds like this is to me). To quote, Still, it has some good sides -- several escape abilities through Burglary and CK, a heal, some ranged and some defense (plus pets through Fleshsmithing). It's not optimal, but it's not bad either.