While I'm not sure exactly what the turn set up is, it sounds as if you perfer an outside line (berm) opposed to choosing a rut left by quads. Ruts are your friend providing you keep both wheels in the same rut, loose one or the other... Practice "rut riding" get reasonably good you'll become much faster. Cross ruts are a pain, generally when faced with cross rutted turns I do ALL my braking entering and attempt to power thru the turn in essence making my own rut... I'm sure others have better idea's for cross rutted turns. If the turns are sharp enough and depending on the soil you might try a brake turn, straighten up and go...
Good Luck