The river pirates quest is annoying because you have to destroy 25 parties. If you reset it to a total of 5 or 6, but high-level enemy like the sea raiders, it becomes much better. Better loot, more challenging, and not so long-winded. It's also 100% compatible with vanilla. Another quest might be that MERCHANTS habd out the 'capture prisoner' quest, but you have to take outlaw-types prisoner, eg brigands, dark hunters....