For what it's worth, it doesn't have to be the dungeon closest to your level. Any level 51-59 or 61-69 dungeon will pop a piece of gear right into your inventory on clear.
To contribute to the thread myself: my last two trial roulettes have been Titan Hard, which I actually kind of like getting every once in a while to break up the Ramuhs/Shivas/Moggle Mogs.
As is oft the case for my roulettes, I queued in with some friends for the first: me (BRD), a WHM, a DRG, and a WAR. I don't recall the party composition otherwise except that the other tank was a PLD. So we load in, see what we're in for and basically give a collective "oh man" before the pull. WAR friend pops Defiance, PLD pops Sword Oath, and we're off! Things go well for a few moments... until DRG friend falls off to one of the first few Landslides. Whoops. She apologizes, we all have a lolDRG laugh in the party chat (thanks for being such good sports, everybody!), and we continue on with the fight. At some point, WHM friend goes sailing off the platform. Whoops. We push on through the heart phase, and people just start dropping. Towards the last bit of the fight (the last 10 or 15% I'd say?) we're left with me, the two tanks, and the other healer. WAR friend continues tanking like a boss, PLD is on-point with breaking party members out of gaols, the... AST, I think? is keeping us all alive, and I'm DPSing my heart out. Things look good until the AST is gaoled; PLD and I free them ASAP -- but they immediately eat a Landslide targeted at the PLD before they even have a chance to move. Whoops. With Titan almost dead and figuring I have little left to lose, I use the first BRD LB3 of my career and manage to land the killing blow just as WAR friend dies. That was a butt-clenching run, but it was really fun, haha. It was nice to walk out with some comms as a DPS, too.
TL;DR: Titan (Hard), only two people left alive at boss kill were myself (BRD) and a PLD.
My second Titan (Hard) roulette went much the same, actually, although this time DRG friend didn't fall off until about two-thirds through and WHM friend didn't fall off but instead died to a stack of Weights of the Land... and never got Raised by the other healer for some reason; they kept raising DPS instead. I believe the fight ended with myself (SAM), the two tanks, and the other healer alive this time. A little smoother, for sure. Was disappointed I didn't earn a single comm for being the only DPS to manage to stay alive, though, haha.
I know I say this pretty much every time, but once again, not horror stories -- just mildly interesting ones. I had fun on these runs!