Don't feel bad, the bulk of content even now can be done in full darklight, and it doesn't take very long to upgrade these days.
Just run Crystal Tower a few times, to grab some ilvl80 gear and Myth tome. Then you can either start saving up for Myth Tome armor, or run the first few turns of Coil for ilvl90 gear.
Or you can just Vanity your artifact armor, that works too.
Feel free to ignore CT unless you're like me and have nothing better to do than test the boundaries of your sanity or have a clever answer to the infamous "why are you doing CT?!"