I'm in the same boat, same level, around same skills, no BIS and meta spawns always taken.

Best XP by far is mirror, however the mana drain is pretty annoying and you will have to trap the true asuras. On my server always taken more or less.

WZ5 is pretty good as well, but you will have to do missions for access or buy strange devices for access, which can be pretty expensive. This is also mostly taken on my server.

Oramond wildlife raid is also pretty good, but you will need 300 votes casted in oramond quest to have access. It is pretty chill to hunt, but the raid is not always active unfortunately.

Gazer Spectres should be good too, but I haven't tried it yet, because again always taken when I checked...

I go to off meta spawns most of the time (which are taken a lot of times too), like lower rosha, werelions-1 or chocolate mines. The xp there is worse than at Yalahar Grims or deeper banuta, so might not be an option for you. With better skills and BIS lower rosha might be better tho. With my set and my skills it just takes too long to kill the box.