A couple of tips / thoughts -
1) Moss can be like black ice if your bike is not completely neutral when traveling over it, you will slip - if you are making a turn - then plan on slipping enough to fall. (usually)
2) Keep your arms relaxed as possible - stiff arms mean -
- More weight on the front
- Less ability micro-maneuver
3) Rise slightly out of saddle and keep weight on outside pedal. This lowers CM and puts a bit more weight onto the rear and moves the CG slightly outward towards the traction side. Also - if you do slip, you may be able to counterweight / steer enough to keep upright (i.e. drift)
4) Look ahead - not down. You can better adjust your body position when you have a farther viewpoint to reference.
5) Shift hips into the turn - not away from it. Similar to CX type turning - which is somewht opposite MTB turning. Shifting you hips into - towards the apex puts the bike into more traction neutral position whilst rounding the turn.
6) Practice - find some grass with a slight slope and practice increase speed cornering down the slope. Both ways. You'll probably fall quite a few times, so suggest to not use your best bike for this - and maybe wear some elbow or knee pads. Set up a few cones so you have constraint and targets. You'll be surprised how good you can get with a few dozen passes.