Build held up (since the map got nerfed), but mob count sort of caps around 2K, there is a lot of golden Super Wyverns for quality sake, but just not awesome as a map. TB needs reset at about the half way mark, or the final rush will crush you.
Based off my current Ruthless build,
Party: 1 TB monk on North Stack, 3 Summoners with guardian pets (monk/huntress), 2 South Stack, 1 North stack.