More info on UW FoW

So i have been trying to figure out this whole FoWSC and UWSC stuff. Something about terraway. Not sure what it is and can't find a whole lot on it.

How do these runs generally work?
What do they accomplish?
What type of builds do these teams run?

1. The teams instead of being as 1 party splits into sub groups and each person/sub group does the quests and clears foes for their given area . ( uwsc works that way an im sure fowsc is same )
2. when uw/fow is completed ( all quests ) there is a chest that appears and there is also a monument statue in hom for both places once completed.
3. check pvxwiki.com under speedclear section for builds and usage.

oye

and another thing

99% of terraway pug runs fail. If 1 reaper dies, whole party wipes.