Where to even begin with TEA. The Epic Throwdown With My Boy Alexander (Ultimate) is my favourite instance in FFXIV. The only other instances that come close are maybe Seat of Sacrifice (the Extreme version), but only when I was (somewhat) blind progging it in PF a few months before Endwalker. Not to say that other fights aren't fun; I am a huge fan of most Savage content (I think P10S is one of the best fights in the game), but holy hell TEA is without compare.
I feel genuinely giddy when thinking about the fight and Alexander, to the point where I literally have to let out the fluttering in my chest with creepy giggles. That's the sign of a good time right there.
Alexander has always been my favourite primal in the game. He's a robot. He's a god. He's a robot god, operating at such a rate that he can accurately predict the future and is a danger to the world due to how much power his processes require. Also he's Catholic. He's not even a 'he' but he's a 'he' to me u feel. As cliche as the whole "robot can't compute emotions and they are its blindspot", it worked so well in the Alexander raid series. He sees potential in an unknown and uncalculatable future, and he tests you, giving you a chance to go back in time and change the past. Now multiply that by 59 hours of prog time.
The music, of course, is insane. I never got and never get tired of listening to Locus, no matter how many times BJCC sent our asses back to Living Liquid, and the payoff of hearing the orchestral theme start in all of its grandeur during the final cutscene...man. I am a fan of orchestral music, but sometimes it sounds quite generic, especially for a final boss theme. Moebius is great though, keeping the "happy" and triumphant "final lap" feeling that the end of the fight should have; Alexander, seeing that you are truly great enough for his true form, not a sad moment in the slightest--and the music throughout the entire fight reflects it.
The attack names Alexander has (while very fitting of his nature and the nature of the fight; see "Catholic" (slash j)(not slash j)) are so fucking funny. They work so well with the theme of Holy Justice, but...having to resolve debuffs that are called House Arrest and Restraining Order will never not be funny. Me when I get hit with Defamation (in FFXIV) bottom text. Something something Aggravated Assault.
The enrage gets an entire section for itself...because they made an enrage so perfect that it'll probably never be beaten. I'm a fan of soft enrages (even when the word "soft" is used so loosely that the enrage may as well be a 10 on Moh's scale), such as Halicarnassus in the Omega raids using the puzzle mechanic of the fight, but simply making the solution impossible to achieve, or Ultima Weapon (Ultimate) taking your party members one by one and placing them into the Pain Sphere for the whole raid to see. Alexander's enrage goes beyond all of that...it doesn't even deal any damage. You simply run out of time to fight him. He just freezes the party members one by one in time, until finally all of you are sitting, frozen in time, unable to do anything but listen to the final bell toll (and then listen to Locus again because ur ass just got sent back to living liquid, baby!!). Impeccable tbh.
Okay, finally, I'll actually talk about the fight itself. There are some points that are negatives to the experience, for me: the Jagd dolls and their very touchy health make for annoyances, even with playing consistently, and specifically the moment when Cruise Chaser's plasma shield comes out and you have to use a GCD and some oGCDs on it feels quite clunky, especially when the game's wonderful and critique-proof always-working targeting system acts in its usual, ""Passable"", way. However, it is definitely only these two points, for me. The entire rest of the fight...impeccable. Even redoing Living Liquid feels smooth, especially once you get your rotation down to a science that you've had to read several peer-reviewed papers on (aka The Balance and its guides lol), and the last phase of the fight being relatively simple so that you can focus on the music and the stress of staying alive...man...
Anyway, everyone should do TEA!! It is not easy, simply because although everyone can definitely learn to do it, it takes a long time and a group of people to do it with. If you're ever in the place where you can do it...do some Savage fights first to get comfortable with your job lol, but then definitely do TEA please and thank u