The Undying Mind, Shield Brothers, Echo Chamber, Cerberus Vae III, Sunless Cell, Dust Palace. Since the launch of Taken King, these are the only Strikes I've seen in the Level 36 Playlist and the Heroic Playlist. I enjoy the Taken King strikes, but I feel it's going to get boring of them very quickly if these repeatedly show themselves during runs of the Strike Playlists. Especially Undying Mind, even though it is an older strike, which feels as if it is played every other strike. With the addition of boss specific loot, it made other strikes seem more replayable and there would be more reason to stick around in a Strike playlist in the hope of, e.g. Sepiks Prime, showing up in the rotation. I'm not sure if Sepiks Prime drops specific loot, but it would be boring to grind a Level 8 Strike to find out. Add more of the year 1 strikes into the playlist rotation to increase desire to stay in the playlist for longer.