Math hard.
You have 7 armor slots, 2 weapon slots and 3 jewellery slots for a gross total of 12 slots. Since you can't craft jewellery, you need drop set items there to make them count toward set bonuses.
Your choice of drop set (Shadow Walker) has both, necklace and ring.
Smart conclusion (with math): use 3 jewellery plus two armor slots for SW, that leaves you with five slots for hunding and two for any other.
Math not hard. Training is everything.