Hi ... I am a photographer that picked up a few lenses for my Note 8. I have the new Moment Wide from Moment. I also have their case for the Note 8 to mount the lens. It is very sharp and has excellent image quality. I can recommend it. I also own the Moment Fisheye (ultra wide lens). I would recommend that you only get the Fisheye as a second lens. The Wide is extremely useful, the Fisheye is a special purpose lens (but it is nice quality and is sharp). For a tele lens Moment makes a 2x tele, but I own the Sirui 60mm it is also a 2x tele lens. Since the Note 8 has a 2x camera module, why would you want a 2x lens? Because you can use it on the primary, higher quality camera module in lower light. The Sirui is sharper than the Moment 2x. It is very sharp. The Sirui can use the Moment case because it has a lens mount that is very similar to the Moment lens mount.
If I was only going to buy one lens, it would be the new Moment Wide. But, the new Moment Wide and the Sirui 60mm is a nice combination because it gives you three focal lengths to use. The standard lens in the Note 8 and the two additional lenses.
I don't know if you are shooting stills or video. For video I also have a DJI Osmo Mobile gimbal and two Moment counterweight (50 g., 100 g.) so I can use the lenses on the gimbal and still balance the extra weight of the lenses. This combo can create very smooth/stable video.
Good luck.