Being able to check lox roughly once a minute at a (vaguely remembering) 60% spawn rate and a combined 58% chance to equip daggers yields an effective drop rate around 35% per run. Or something like 3 min per loxblade. Consider that you need two vs. a 2hander setup and we can extrapolate this to 6 min per a single general piece which feels about right when you look at the time it takes to clear most roguelikes (except the thrice damned PV)