OHBENJI released a new video explaining what the Set effects are from Later gears, you can choose any of them you want if you cleared the corresponding content where the set effect is available enough times and you can freely swap to whatever you need.
Besides certain classes like Shadowhunter requiring a certain amount of Spec and runes to work, Relic Gear set effects are a huge part of the game and the way to make classes very strong. The game is already balanced around this point in time when we have a lot of sets because we launched with one of the most recent class balance patches in our version.