This panel is a WIP.
Narrowing/Widening Witch Hunt consists of a set of four alternating in/out AOEs and near/far baits. The first AOE indicated by the cast:
The baits are indicated by the symbols that appear on the boss:
The glyphs on the symbol are separated far out, telling you that the bait will be far.
The glyphs on this symbol are smashed near together, telling you that the bait will be near.
For the DN strat, you can ignore the near/far baits, the symbols. Instead each role has two pairs of positions to memorize:
As long as everyone is standing in their correct spot when the AOE snapshots, you should clear this mechanic no problem.
(You can pick your role here in the sim in the upper-right, above the mini-map)
For the positions themselves, you should use the arena floor itself, or the boss, for proper positioning. Waymarks in PF might be setup to facilitate separate mechanics later in the fight and not setup for Witch Hunt, but the arena never changes and is safe to use to help you properly position yourself.