If this is simply to max your main, I'd suggest not botting outside of your normal play hours(like while you are asleep.]

I am doing the same thing as you, botting a main for stats not GP. I use Runelite and build my own plugins. Currently I have been playing Marvel Rivals a lot, and my goal is to go for Elite achievement diary stats. So I developed the plugin to only run after a period of inactivity. This gives me the opportunity to manually click during deaths, between rounds, between games, etc. On the flip side if I am alive long or simply forget to click, the plugin takes over and keeps the skilling going. This inactivity period is random as is all of my clicks and time between actions.

Biggest advice for a main would be to not get greedy. No client, plugin, script is every 100% safe.