Would training agility for a long period of time (2 hours+) and record it all on one mouse recording file, then replaying that be good for not getting banned?

Always a risk of being banned regardless i supposs regardless of what you try,

unsure about the mouse thing though, 

it wouldnt work, the game turns your camera 1 pixel ever min or so, also, there would be no anti-ban. So you would get banned for running around the map randomly once it missclicks once

it wouldnt work, the game turns your camera 1 pixel ever min or so, also, there would be no anti-ban. So you would get banned for running around the map randomly once it missclicks once

Checking agility xp every 3 minutes to not get banned, great anti ban

If you do what Jack said, you should be fine but your clicks will be exactly the same each time as opposed to a bot which randomizes your clicks. 

or just buy a script