I am going to an upcoming DTB concert and was wondering what songs he usually plans as a general rules. So far I only own Ziltoid, Synchestra, and Addicted.

there is no "usual". All we know is what's being rehearsed: viewtopic.php?f=49&t=9112&start=0

[Octillus]

additionally it's been years since he's been out, so things have changed drastically.

i honestly didn't give a shit what he was going to play seeing that i've been waiting over half a decade to see him. his band sounds amazing and dev is still dev. the genius fucking mad man that he is. one of the most talented people alive today in my opinion. if dev toured with gojira and meshuggah, it would make my year, decade. i don't think you could top that line up. i'd travel across the omniverse to catch that show.