The split that works
11 survivors ÷ 3 LOS families (the near and far arches, the tall stones, the tree cluster) = groups of about 4. Each group takes a different family, breaks line of sight on arrival, then turns — and no group lives on the water, which the map guide documents as bright, flat, and exposing. Result: the hunter's wide first loop finds at most one group, and the helper check after a hit finds a pair instead of ten.
The split that feeds the hunter
The same lobby that stacks at spawn hands the documented S-tier opener a free multi-kill: the spawn read says “if they stacked, take the gift.” Half-stacking is nearly as bad — 5 or 6 players at one landmark is one arch sweep for the hunter and a chain of helper-chases for everyone else. The planner's rule of thumb: no landmark family holds more than one group, and no group holds more than a duo if you can help it.