I’ve done the caster mod should I also get upper control arms?

[Slowguy]

I did the caster mod early on. I also cupped the lower control arms and did lower spindles with bags. Needless to say it’s much lower than stock. I’m guessing at least 5-6” inches at ride height.

I also assume I’ll need to space out the upper ca’s quite a bit even at ride height to get a good camber adjustment. Been researching and it’s not a good idea to stack many shims? If not, and I need aftermarket longer upper control arms for a lowered ride, will this mess with the caster since I already did the caster mod?