So it is true. You have to beat the three hard mode primals before you can continue on in the 2.5 storyline. Ugh. That took about 3 hours (thanks to all the long queues and the battles themselves). I guess I'll talk about each of them here a little bit (not going to do a guide or anything since you can look that up yourself) but just more of overall thoughts on them.
Ifrit
The easiest of the normal mode primals, Ifrit hard turned out to be the second hardest. Lulz. I died twice on Ifrit. The first time was when I was trying to use the limit break on him. I got stunlocked in the animation while the ground exploded beneath me. To make matters worse, I missed. People were laughing at me and making jokes. But thankfully no one really got mad. Second time I died was after Ifrit used his clone ability. I'm not even really sure what hit me but it did a ton of damage. Again, they were laughing at it and raised me..but oh well. At least I got him done.
Garuda
The hardest of the normal mode primals turned out to be the easiest of the hard mode ones. No one died, no one even really came close to dying (I think I went down to 2k hp at one point but that's the lowest I ever got). She didn't even try to limit break, that's how fast we burned her down. It's almost ironic that the hardest one would be the easiest lol.
Titan aka I want to shoot myself.
After waiting for an ungodly amount of time in the queue for this one, I finally got in. I knew Titan would be the hardest just simply based on the patterns he has (he has a bunch) but I don't think any amount of talking about it can really prepare you for how insane this fight really is. The dumbest part about this one is that people were dying on the easy stuff (the move Landslide, which pushes you over the edge if you're hit, and when he leaps up and lands people were standing in the red area and being knocked off). It was also annoying because every time Titan would get his heart out for us to burn down, he'd start spamming the jail thing and we couldn't do enough damage to get the people out and kill the heart both. So he'd just limit break and we'd wipe. After three attempts I experienced my first ragequit. Out of all the parties I've had in FFXIV and all the times people have made mistakes I've never actually seen anyone ragequit. Sure, I've been yelled at for not knowing what I was doing in the last two storymode missions but even then it was just a simple "oops, sorry!" kind of deal and they understood. Here we had someone snap and quit, leaving the duty entirely and leaving us high and dry. Thankfully another person joined not too long after and the 4th time was the charm lol. Somehow we won.
Titan was the first real difficulty spike in this game. I might have died to other bosses but this is the first one where I wasn't sure if we were going to be able to do it or not due to how crazy it was. Of course a few hours later I did the Keeper of the Lake duty which made Titan look like baby's first primal battle.
I'm now on the duty The Chrysalis which looks to be crazy but not as crazy as Keeper of the Lake. lol