I really think trying to hide your botting activity is pointless in this game and here's the reasons why:
A. You don't play with other people. No one will ever report you.
B. After a certain point, it's completely obvious your account is botting. They don't need to detect anything on your end, they can simply look at your time played and gold acquired. My main account which has over 400 hours played since release has just under 15 million gold looted. My bot that has been running since about 2 days before the injunction has around 300 hours played and 90 million gold looted. There is really no defense against those type of numbers.
C. Blizzard will never IP ban. In fact, they haven't banned "by association" since Vanilla. If you knew how IP banning worked, you'd know that it has far too great a risk of getting innocent people caught in the crossfire. They punish only licenses that break the rules. In World of Warcraft, I have my bots all connected to my main account. They bot, and send materials to my main. My main acct processes and sells them. I have lost 5 bot accounts. I have never once lost or even had my main account in question. In fact, my bot accounts were on my very same Battle.net when they were closed. I also live with my brother who plays D3 and WoW as well. He does not bot. He has never been banned or suspended. I do not now, nor have I ever used an IP or machine spoof. Blizzard DOES NOT ban by association.
Not banning your main in wow and not investigating it are two completely different things. You can make sure, that they will investigate all connections from the IP. Sure I can bot 100 pcs on the same IP and my brother can have an account on the same IP, what will happen? My 100 accounts are closed down and my brother keeps playing as does my main.
Do you get it now? It isn't banned by association it is investigated by association and good luck having your other bots not banned. When they all have a different IP/Mac adress/machine code that chain investigation cannot occur by ip - end of statement.
There is no bli bla blu about that kind of fact. How blind are you? Did you miss all the threads about 5/5 banned, 4/4 banned and so on? Do you think they stumbled on all the bots of a single botter on a WHIM? By chance? Did you ever ask the question: How can they get all the bots at the same time? No you didn't.
When you have that kind of setup, that I suggested your last concern is how to collect that gold on one account. Obviously if you take all your accounts and direct trade with your main, then that is a liability. I have no solution for that, since there is nothing that completely breaks the links.