You can lower your duel level down to 150, howeverThis events are already nightmarish for players with high dueling level. They usually have only couple of targets, so using debuffs is obligatory. I have 6-7 targets available right now on Juarez, and I can't put a bounty at any of them. Inno obviously didn't think about that scenario.
It is IMPOSSIBLE to get around the 30 quest cap. This is the point to discuss because there is no alternative.30 quest cap is old problem, no point to discuss abut it.
It was your choice to get your duel level to whatever it is, and you can also choose to lower it back down to char level.