please be aware that mods in general are not designed to be used with other mods unless specifically stated otherwise. For instance I make submods for synergies that are designed for peoples choices/needs WITH synergies.
mods like the 'community mod class pack' have bad side effects that can alter the gameplay enough to make it completely unplayable. In this mods case its a bug. in other mods cases its a lack of planning or care for balance. Sometimes you have to start new characters when this happens, sometimes you won't.
Just be aware that Synergies is committed to a dedicated balance scheme and is invested completely in giving you the most enjoyable challenge you will get out of ARPG gameplay. Outstanding balance bugs will always be my first concern to fix quickly.
As of this posting there are no game breaking bugs within synergies, if you encounter one, it is a different mod.