Always look to get 2 sets on your build, chose sets bonus that match your character class and sometime braking 1 set bonus for monsters set is not worth losing one of your set bonus!
Well after making a serious arcanist build i can now safely say that he will be collecting dust on the server since my new sorcerer build outclass him in every single aspect. In my book arcanist is a very overrated class.
Also since i am doing the same run at the volcanic vents i have discover that my recent Arcanist build is complete crap compare to my brand new magicka sorcerer wearing a mix of necropotence and mother of sorrow it have sustainability and also pack a serious punch. I can litteraly spam my crystal shards! My arcanist was dying so many time that it was embarrassing and with sorcerer i died only twice after 10 runs.
If you are currently getting leads for your mythic items don't make the same mistake i made, i was trying to get igneous lead for the Oakensoul ring and i did 100 + vents thinking my RNG bad luck was hitting me like a train!
Well i had it but i didn't understand the antiquities iconography in ui so here a screen capture that show you what to look for since it's not that obvious for new players.
Icon show a question mark = You don't have it
Grey out silhouette of the lead = You have it but it is not excavated.
Coloured lead icon = You have it and it's excavated