Looking to farm Thieves troves? The daily endeavor is rewarding 90 Seals for doing so, plus there is a weekly endeavor for 7 troves. Picking locks is rewarding 40 Seals.
YouTube Wings of Oblivion. I have two Thieves trove farming videos and a Best treasure chest farm in Eso video.
Here are three videos. Click on the links below to help you with your farming. Enjoy.
To answer your question about loose panels, sadly, no, they don't count towards the endeavor, but you might as well pick up the free loot while you're there! 😃
I really think they need to expand this one. Find a thieves trove, psijic portal, advanced chest or better would at least add more rare itms and seem less annoying.