Darkfall Unholy Wars recently introduced custom roles to the game, allowing players to take on any combination of abilities to build a truly unique character. If you guessed from that sentence that there are probably certain balance issues to be worked out, you'd be correct. The community team recently posted on Facebook to address concerns from players regarding balance, noting that it was inevitable that such a major patch would have some issues to be worked out.
Rather than patching immediately, the team intends to wait for a few more days to see how matters develop before addressing balance issues. The posting also states that the game is based around large-scale combat, so duel performance is not necessarily indicative of the game's overall state of balance. A full update regarding balance adjustments and bug fixes should be available next week.
[Thanks to Dengar for the tip!]