Which arms are you referring to? All the uniball arms I've seen ARE designed for alignment correction, and have some positive caster built into them.
2 things here.
1- Most Bilstein adjustable shocks/struts/coilovers for our rigs give a max of 2.5" lift WITH STOCK COILS.
2- When using a 3" lift coil, you should leave the perch at the lowest, because lifting our rigs over 3" does more damage than good.
As you've read, guys have gone over 3" without any adverse affects- that they know of. It's still not recommended.
If you have a 3" lift spring, and move the perch up over "stock" height, your ride will likely be pretty stiff. Adding armor/steel winch cable might bring you down under 3" lift on the lowest setting, and at that point, I wouldn't have a problem with going to the next step up.
Have fun [emoji1598]