I don't expect this post to be remotely helpful, since I don't think I did anything that hasn't already been found, but I thought I might as well share my footage on the 1/1000 chance it might be.
I wasn't going for the relic. This game was just to beat the EE in tier 3 Cursed (for the camo). When I beat it, I spent after levelling up a weapon. So, I straight up just went *’eh, might as well try to see if I can get the relic‘.*
I got it first try, not even sure what I was actually doing. As you can see. I PhD'd under one chandelier twice, then under the next one, and heard the laugh. I didn't PhD under the other chandeliers, just those two. I spent the entire round on Mars; this clip was the only time I was in the museum during that round, so there's no chance that I had PhD'd under the other chandeliers earlier. Given I got the laugh after PhD'ing under just two, I'm actually wondering if this is a bug. If not, then maybe you don't have to PhD under all of them? I'm not in the loop on where we're at with this hunts; all I know is what I read, about the chandeliers, on the wiki.
(There's no enemies around because I'd killed OSCAR at the start of the round and left Rodney on Mars.)
Sadly, I don't have the relic since I died on wave 6 of the trial; I wasn't going for it, so I wasn't prepared. I'd already used up my equivalent exchanges (two on Caltheris, and the last when my dumbarse zoned out whilst I was training), and I didn't have a self-revive equipped. Plus, my War Machine (for the HVTs) was low and I didn't have the salvage to replace it when I got to wave 6. It's a shame, but the relic itself isn't one I'm likely to run anytime soon. It's not the end of the world… a bit annoying, though.