Any Class Any recommended mythics / builds that I should get before 2.1 Rekindled World drops?

Title. Im thinking about both Lament and Fatal (Fatal for arcanist) for mage, Hero for warrior.
A good Epoch is currently out of my price range unless i sell some of my other mythics (which i won't do), and im not really a fan of cataclysm (skill issue).
I already have:
- Warp, that i sniped very hard and can sell for like 6-7stx more than what i bought it for and buy a cheaper one if i want.
- Collapse, Idol and a trash Guardian
- Olympic and Sunstar
- Divzer
- Stardew, Moontower