Been botting for years, and I had the same questions when I began. Botting with armor/robes or other clothing items can actually reduce the ban rate as less will report you, or suspect you of botting. The more expensive the items are, the less people will assume you are botting and ignore reporting unless it is obvious. Not wearing items or wearing items have the same ban rate, though increases the ban rate when you are reported to a moderator/administrator. As long as you don't look like a botter, you should be fine. Also changing outfits could potentially help. Setting private chat/public chat off is a good thing. If people see you are ignoring them, and they notice you are not responding and they are suspicious of you botting it's clear if you have the private chat off that you can't see what they said unless they are a moderator where the text shows regardless. Chances of a moderator directing his or her attention directly to you are very slim. I always keep my private chat and public chat off, or on friends (note: I bot in a world where none of my friends are so they will not approach me) which helps as well. I would not make it a routine where when you bot, you only turn your private chat/public chat off just to bot, then turn it back on. I'd keep it like that as if it was normal for you to do those actions. So randomly turn public to off/friends if you bot with public off/friends when you play legitly to help with that. I'm sure you know the rules about safe botting, which can also help greatly if you do not want to get banned. I wish you the best of luck.
... hope you get it soon enough 
