If the dots are moving down (towards me) , that is telling me the ball is on a downslope.
If the dots are moving up (away from me), that is telling me the ball is on a uphill Lie.
Is that right or is it the other way around.
Chris said, Roger. Imagine a giant 3ft x 6ft grooved cutting board like this one::top of board towards target.
Lay it on turf where your lie box is. Place a white marble in the middle of any side groove, and it will roll downhill.
If the marbles on the short sides roll 'up' towards the target area it's a downhill lie and the ball will come out low and short with a lot of roll, because your club has been 'de-lofted' by the lie. If the side balls roll 'down' towards the viewer, it's an uphill lie; the ball flight will be high and short with little roll, because your club's effective loft has been increased by the up-slope.
Likewise, if the balls in the 'sidehill' grooves move to the right, the ball is below your feet. A normal hit will curve to the right (the same direction the marbles are moving!)and you'll lose distance. Conversely, If the ball is above your feet, the marbles are rolling to the left, and the struck ball will curve that direction - left.
As it stands now, the corrections need to be pretty significant for all but the slightest slopes. (this is what is aggravating to real life golfers playing UEL, because IRL only slight adjustment need to be made except for extreme slopes).
The first few posts in this thread have laid out the strategy pretty well. Avoid trouble, even at the expense of distance - a choked down driver or even a 3W may be a better option than bombing that R11 full blast.
Be willing to take 1, 2 even 3 more clubs on approaches to compensate for the uneven lie 'distance penalty'. Distance lost can be 5% to 30% in a green box lie, depending on slope. Yellow-orange boxes mean 40% - 70% distance loss. Red box, you're screwed.
For side-slope compensation I move the aiming point 'into the slope' AND try to miss the ding' on that same side. Ball above feet? aim right, hit late. Ball below feet? aim left, hit early. The larger the slope, the more you have to compensate with aim and meter timing ... and the more club you need to use.
Final point: consider punch shots over full shots - I believe the directional penalty for a sidehill lie is reduced for punched shots.
As pointed out, these are tough courses, and par is a good score. Think of the most recent US Open at Oly; most players finished OVER par!