Playing with 6 monks on hard
Picked Kolsc with a twist. I sneaked in from the battlements, cleared the the ground floor of all guards except for the odd 10 paladin/guard combo guarding the front door. Went back upstairs and slaughtered most of the temple sect on the third floor being going down to the throne floor and slaughtering all the guards there.
Headed to the throne room battered and bloody and without camping supplies. Talked to Rodric about his wife, but lied to him about his pragmatism and promised to kill Kolsc. Went back to the city, resupplied, came back, rescued the kid in the sewer cell, started talking to the priest, who has nothing but empty promises despite being an ally to Kolsc, so I killed his entire sect before those religious fanatics can do more damage. Then I went to the sewers and cleared it, talked to the animancer and when she showed me her progress in her research being nothing more "My early stage research that has already cost a whole village their lives is about to get happening, but first let me make more flesh golems!", I killed her and her minions as well, after picking up the (undead) cat of course. The cat didn't complain at all.
Went back up to the throne room, used my archer monk to bait out the two champions of Berath to an unsuspecting corner where they got 5 monks jump on them and nearly instantly kill them (arbalest monk scored a prone inducing crit, causing one champion nearly immediately died the moment combat begun. Quarterstaff monk hits him twice while he was down and that was that. Second champion got swarmed by 5 monks and an arbalest killing him nearly instantly as well). Then the rest of the throne security team starts flooding down the hallway and I sent my guys packing to the other side. Both ranged monks already had long stride at that point, so they got there a lot faster than anyone else and sniped out an archmage. Second archmage follows them into the opposite room (from where Rodric and everyone else is busy chasing the rest of the party) and gets another arbalest/bow shot which instakills him. By now, Rodric's group gave up on chasing down my main party and started going back to the throne room, where my two ranged monks are at. The favoured of Berath gets a bolt between the eye (prone critted again) and 2 arrow to the gut, killing him. The paladin tried to chase my archer down to no avail, running straight into my monk party already positioned in the queen's room, where he gets wailed on by 2 full plate con+mig monks and 2 polearm wielding dex+mig monks and the now reloaded arbalest monk.
With that done, Rodric's retinue is now down to 1 bodyguard, 1 archer and Rodric himself, so I just do the normal formation of con plated monks up front supported by polearm monks while ranged monks pick out dangerous or weaker targets. The archer got killed near instantly by the ranged combo and one of the plated monks rushing up and smacking him in the goobar. Bodyguard gets riddled with arrows (turns out padded armor is pretty bad for arrow resist) and Rodric himself gets engaged with one plated monk while two monks with sticks taking turn beating the **** out of him. With Rodric now dead, Kolsc moves in to claim the throne. He's been a pretty swell guy up to now so I decided not end the lineage of lords then and there. The guy was also not angry at me for killing his head priest buddy so I assume he's a pragmatist as well. The town can deal with their hollowborns without the help of fancy magic or faith.