1. Side Shot with phone is best hands down for the money.
2. Eagle Vision Cam Setup is with Sony RX100 V best quality and up 1000 FPS recording.
3. G-Line scope mount or similar systems with phone adapter are pretty good but more work and hassle the side shot.
there are even more options which I have but am not going to even get into as they didn’t make my overall cut for something I’d personally recommend