My opinion, upwind only.

Crew positions

1, Light wind and no real waves, crew to leeward hull to help lift the windward one and get well forward
2, Lightwind and some waves that are shaking the rig around, crew leeward side of the mast and as far forward as possible

Downhaul

1, Light wind it is on fairly tight
2, As soon as you start to make "proper" progress and there is a bowwave forming id consider taking it off as it this point you may have enough wind to keep the air attached to the sail(s)
3, As soon as the hulls start to get some lift I would have the DH off fully (even the odd crease in the sail att the bottom)
4, as soon as overpowered, bring the DH on again.

Mast rotation

1, very light I'll de-rotate a little to keep the sails flat
2, light (but "proper" progress) max rotation.
3, As soon as nearly powered up I rotate to the shrouds