Not much has changed since you left.
Gear progression is extremely steady in this game. Have best gear in the game, stop playing for 3 years, come back and your gear is still considered top-end.
Strata and Armonia still reign king for PvP sets if you have the full set bonus.
There are also cash shop weapons (Abyss and Vigilar) that are nice for raid racials.
Weapons are easy to get if you're active, same with armor though requires a bit more patience.
The rarest accessory recipes requires more work and you need to be extremely active in the top clans, and some luck because you're up against other players/clanmates wanting the recipe when it drops.