That isn't really a thing here. There are several builds that handle most of the content well but nothing that can do it all. Nothing cheap anyway. A IK Shield Throw Barb can take on three out of the four Dreamlands bosses(Mappo being the one he can't touch). From what I've heard, a well geared Nado Druid can do all of Dreamlands but that also isn't cheap. Same goes for a well geared Javazon. I usually start with the Barb and use the Trang Necro to kill Mappo with Poison Maelstrom.