Ok, so I just got 100k NX

I'm planning to use;

30k on gach
10k trying to get a certain hairstyle

And then I plan to use the rest on MTS to make equips. I want to make;

6 Atk or higher glove
5 Dex or higher earrings
6 Dex or higher PAC probably 1 or 2 ATK)
15 Dex or higher Sauna/Bathrobe

I'm just wondering what would be cheaper to try for first?

You could probably buy all of the above equips straight out of mts with 100k nx. i would say go looking around the mts to see what prices are before you actually decide to go buying gach tickets.