I would go for 3
It will work "ok" with 1080p, all on low (few settings increased on main, like view distance to 3 and particle density to "good"). 60 fps front and 25 on slaves. Use direct-x11 legacy.

Try boost the cpu a bit if possible, to 4 gz or so if possible (maybe there is a turbo settings i dunno).
If you dont feel comfortable with this, just let it run default.


Before you buy, consider creating 3 trial accounts and give it a spin. If you dont like it with 3, try 2 instead.