I think trading "commonly botted" items, or straight cash, is a dead giveaway. I never do it. I'm not giving away my tips, but use your imagination. Do not ever trade GP, logs, fish, ores (etc,etc) as I believe Jagex watch these trades if one party is transferring a lot of wealth to another.
Who did you buy the proxies from for the mules? If no proxy, were there any bans on the IP before?
What is the ban description in "Account" on the RS website for the mules?
If your entire WC farm was on 1 IP, this would have got you insta-flagged. Jagex would watch for any account trading with this obvious farm.
I trade directly between several accounts all the time, all of which bot every day, and they're all safe. Just be smart about it.
Bahaha, cmon. You can literally ask Hans in Lumbridge how many hours your account has played.