If its from webshop, only thing you can get that is legit good for pvp is the shield. You can either use memnon, royal, crimson, cross or any shield style that you want if you're using Amun.
For scepter, Arthur and TMOE has a big option that you don't want to count out. You'd want to use semi TMOE instead of any FO scepter out there. Note that you can't make a semi arthur.
I think there are 2 types of Amun users ingame right now,
#1: Uber Amun + Uber Arthur Excalibur + Uber Arthur pendant + Uber kantata rings of wind + poison and any shield that you want.
#2: Uber Amun + Uber Tartarus Mace of the Emperor + Uber Tartarus Ring + Uber Eplete Plate Shield + Uber Eplete Pendant then they put in a Ring of Wizard.
For tier1,
Nyx + Khons is can be combined with Arthur and Kantata rings as well.
Agnis + Browii is not flexible, Only TMOE can get in. Eplete's first option won't even work because agnis has a pendant i think.
Surtr works with 4 parts, Can be combined with full eplete + full TMOE.