Coniferous uses N7 not AE. I want the blue on black one cause I got BOB and am getting a blue s x h. But I have no use of the others. A Dolch/Skydolch one might make sense. Hyperfuse and Sky dolch and dolch reborn all use the same one. I also think a 9009 one would be smart. Or like Laser given the number that sold.
Either way though, I would buy just for the BOB key, just wish there was more compatibility with other stuff.
Oh also, camping could be a popular one.