Duo questions come up a lot so I figured it was time to rate all possible combinations!
I created a table of all duo combinations here:
http://bit.ly/p99duos
Find the class that you play as, and rate how it is duoing with each class along the top!
Ratings are not reflexive since some classes might do better to solo than to group up. For example, a Warrior might prefer duoing with a Necro to solo, but the Necro may not.
EDIT: If the above link doesn't work:
https://vivid-inferno-1662.firebaseapp.com/