1) Get rid of PS3. Not because it's causing this issue necessarily, just because other methods are better. I own both PS4 and PC and play FF14 only on PC. Hardware is a lot faster, and also you should be able to get headphones.

2) I've seen cases where small amounts of lag could cause animations to sometimes appear on your screen for shorter time than they should. This could possibly apply to the Fireball and Conflagration markers you mentioned. Same for Twister. In my experience it was connection lag that caused it - not the PC. I was able to solve it by changing how I connect to the internet.