Can you add a function that switch your battle.net account after one point ? eg : 100 wins,1000 minutes,achieving rank 10 etc.
In this way,if you want to farm gold on 2 different accounts it would be better ... you make 100 wins on one account and then the bot switch the accounts and makes 100 wins to the other account.
The accounts would be saved in a txt and the bot would take them from there and write in battle.net application to login.( i know it is possible )