Sorry I'm late guys
The easiest thing to do would be to swap a coil and plug from cylinder 8 to another cylinder and if the misfire goes to the cylinder you swapped the coil and plug is your culprit.
if it stays at the same cylinder then you have to dig a bit deeper. swapping over injectors and then if that doesn't do the trick do a compression test- dry then put oil in cylinder and then check to see if it boosts up.

Might want to do the compression test first before swapping injectors first-it's easier to do the compression test than it is to swap over injectors.
Feel free to give me and we'll see what we can come up with.