It's just getting a good group more than anything, as harder content has always been. I beat her in my second PUG attempt, learning nothing new because I did Shiva over 50 times when Shiva Ex was new. Well, I guess I did learn about enrage, because the DPS check wasn't really a thing back then. That's the one interesting things about these Unreal trials. If people don't play well, you do hit the time limit. The real difficulty in these is their accessibility and being new. Since pretty much everyone can come try the fight, there's no filter for gear or skill, so you get people who still haven't even read all their tooltips at a far higher rate than you do in Savage or usual Extremes.

Since most players playing nowadays are new blood, they do not know the old fights at all, so even though they may have easy mechanics by today's standard, they are still new to the fresh faces. I lost track of how many people died to bow repeatedly, even after being told the tell, what it does, where you need to stand, and the whole shebang.

My advice would be, clear it maybe once a week, don't bother with the second run unless you really feel compelled to try and farm an item from it ASAP. The rewards are all trivial to make grinding it less appealing. Its purpose is something to do during bouts of patch lull and longterm boredom. So that you're better off still going after the new extremes and savage content.