Would you like an in-game parser?

[AphraelAmarantha]

Honestly? It tells me that you lack awareness. If, after 900 runs, you still can’t figure out when Susano is casting/readying Stormsplitter, then that speaks to your lack of raid awareness. And, unless that improves, then you will be unable to do any other Extreme primals that are even remotely more challenging than him. And I’m not saying that to be mean or anything, and I’m not saying that that’s the case now. But you asked, and I thought I would provide an honest opinion.

No it's fine. My question back is how do you develop raid awareness?

Learning occurs through repeated exposure and practice. Like with your previous example regarding education, and some learning a subject at a slower pace: yeah, they learn at a slower pace, but how do they learn? By practicing; by studying. You don’t learn things instantly. If these fights aren’t getting any easier for you, then it may be that you just aren’t able to do them. If you are really trying your absolute hardest, studying the fights, asking people for advice on how to improve your performance... if you are doing everything within your power and still cannot keep track of a simple tankbuster, then you are just not ready for the content.

Yep, I won't disagree with you here. I find the EX fights quite challenging and I usually just avoid them at this point because I can't really do them, (even with i328, i know I am probably being carried.) The only reason I have been doing Susano recently because a friend asked me to since I've done the fight before several times (liek that really means anything, lel).

On a side note, would you believe that I actually perform better when I don't have to do deal with people in a group? I actually solo'd EX Ifrit and EX Titan with my level 70 RDM. That was quite hard and I died several times before beating them. It was more fun though.

There was really no need for this sentence. At all.

Sorry, I said it because that's how I feel. People go: "these fights are easy!" and then I do everything I can and I find them quite difficult, hence why I feel are they just that good or am I just retarded and can't do this stuff? This leads into:

How are you dealing with the specific issues? Do you try to juggle healing and DPS? Have you tried to just heal and see if that eases your stress levels? Have you Focus Targeted Susano to try and watch for his tankbuster cast? Have you set up your HUD in a way to make it easier to keep track of the things you need to keep track of (MT, party health, boss’s HP bar/cast bar, etc.)? Have you increased the size for things like enhancements and enfeeblements (this would help when looking out for the Churning/dice debuff)? You’ve mentioned what you’re having trouble with, but you haven’t really explained anything you have done to try and alleviate the problems.

I've done everything you have listed except increase size of buff/debuffs and used Focus Target. Mainly because one I didn't know you can increase the individual size of HUD elements and two, what the heck is focus target? O.o