Not saying anything NEG here, but if you use Amsoil it will keep it clean. I have seen it in many UOA, pulling of VC etc. Cars with over 100K miles that look nice.. Also the same can be said for dino but changed much sooner.
Arx will keep it clean and clean a poorly maintained engine..Is one more needed then the other, I cannot say yes/no.
Lanolin ester are for sale all over FYI.
I like Amsoil and ARX..I use ARX to clean, if needed and Amsoil to maintain it. I know some will say the ring pack issue but YMMV.
Heck, you can use LC20 to do the same, 131, kero etc...Pick your fluid folks.