Kamiless weapons are not terribly useful (unless you're a multi-thousand dollar whale) until the 4th Limit Break system is introduced along with farmable limit break ingots from Tower events. At that point they become the best weapons in the game. I actually bought two of these tickets myself because I wasn't paying attention. I'll just hold onto them I guess until they become potentially useful. Though there's not much benefit to limit-breaking these over the SSR kamihime weapons, which you'll have by definition if you're running a strong endgame build.