Well, mixing will definitely help, but thats my opinion.
Reality is, it 'might' help to avoid a ban. (like i said above)
Because if a lot of people report you, you will get auto banned for 72 hours (mixing isn't going to help with this kind of ban). If that happens you should appeal and let them know you do it by hand for only x amount of hours a day and someone must have reported you without evidence. You are innnocent. (add more things)
And on the other hand, mixing is going to help you a lot if you need to appeal.
If you can get by with 4 hours of dungeon farming then do that for safety.
Or go with 2 hours / 2 hours (use hbrelog or arelog)
If you don't want your account banned, then start slow then move up in timings.
Start with 1 hour dungeon botting then move up daily/weekly (so it looks like you are getting addicted)
Also,
As for mining, you should use rndbuddy and/or logmeout plugin for people who follow you/click on you
If you just use public gathering profiles, it will get you banned faster than running dungeons.