Mixed mode never supported dungeonbuddy and questing together. Dungeonbuddy is quicker if you RAF your characters together, but a lot more risky if you're running it by yourself.
I level 1-30ish questing... and once i get past Gnomergon (level 32ish) i switch to Dungeonbuddy and run it until 80. Once you get past Gnomergon the bot can fully-afk dungeons all the way until 80, from there i use Kicks questing profile to quest 85-100. Takes about 34 hrs 1-100.
You can easily AFK-bot from 15 to 90 with dungeonbuddy. Done it countless times, maybe 400-600 chars in total. And when I mean AFK, its 100% afk.
one more question. when i have green items or better, my char never sells them. how do i make him sell them