Backhand, Impact and Binding Shot no longer stun and deal 40% more damage per rank to targets that are not facing you. Forceful Backhand, Deep Impact and Tight Bindings no longer stun and deal 15% more damage per rank to targets that are not facing you.
The perk has no effect if the target faces the player; the abilities stun as usual. The damage boost from Flanking is only applied if the player attacks from behind or the side of the target's facing direction.
Most static monsters in Runescape spawn facing south and do not change direction. For example,
the shadow and smoke crystal amalgamations and pillars at Nex: Angel of Death can be flanked from the north, as can training dummies.
Flanking 3 basics are by far the best non-bleed basics. Flanking 3 thresholds are usually the third best thresholds to use.
Even when Flanking effect is applicable, the abilities still trigger Yakamaru and Solak's stunning mechanics when they are at the north-eastern pool and in phase 3, respectively.