South's left edge is their most dangerous weapon. Woolf needs to have a game plan to counter that.
I'm no expert, I'd like to see if Herbie could play on the right and Bostock to the left for this game defensively. Might no be an issue with Johnson out and if Mitchell isn't 100%. But on face value, Id probably change them over for 1 game. It may be a stupid idea, Bostock seems defensively strong at centre, however that might prove harder up against Mitchell.
With Johnson out, I would target the new winger with field position kicks. Making them run it out all night, keeping the ball away from Gray.
In attack I would mix the high ball to Bostock up (on the right side). Here Id get hammer involved on our left edge against Mitchell and the new fella. And if the centres dont change sides, id be peppering their right side defense all night with high balls on the 5th in their red zone.
Souths have a big forward pack, running out of dummy half at every opportunity is key, the use of JMK will be key, and Plath ball playing in the middle exploiting large slow forwards. Id be getting Fine and Lemu to be getting involved on the edges to keep as many hitups out of the middle as possible.