Specifically wanderers palace(hard). That boss has a couple things going on. From memory... he casts a Doom spell that i think the healer needs to Esuna off of the target. He likes to target his giant cone aoe at the target farthest away from him, so standing closer both makes the dodge easier and makes it less likely to be centered on you. He constantly raises banners. These arent worth destroying, the tank should just drag him clear. When he drops an idol, THOSE must be destroyed ASAP(im blanking if they buff him or debuff you, but the effect was nasty). In addition, you probly shouldnt let his adds stay too long. All in all, they arent really THAT hard of a boss. None of those are hard things to do, he just has a lot of the little things.