Ok I'm stumped. Rear end help please!

If the gearset is used;
it is often impossible to get a perfect pattern.
Concentrate on the driveside, cuz you will be putting power into that side; and let the coast side be what it will be.
The depth shim sets where the pattern sits on the tooth from end to end, the long way, while the backlash moves the pattern up and down, the short way. This is an oversimplification, cuz,there is quite a bit of interplay between them.
I spent several years building those and found that sometimes/manytimes, I had to sacrifice a little backlash to get a good drive pattern.
If the coast side gets too crossed up, with a very nice drive side, the rearend will be noisy when decelerating,especially with a manual transmission. It never gets better than the day you put it in. So sometimes you,again, have to compromise.
With new,quality gears, the pattern usually dials in nice.
Try not to let the pattern creep up too far towards the heel or the top, Big power tends to break them off,out there.