I understand how much of a versatile powerhouse Blue Mage is, and I also understand that to keep with its versatility you need a very wide selection of equipment on hand for sets for every situation.
I'm a casual player, and I'm still virtually brand-new to the whole "endgame BLU" business. To be honest, I only have three sets of equipment right now: TP'ing, "Physical" Blue Magic, and "Magical" Blue Magic (as well as one set for idling and one for resting MP).
But I also know that those could very easily all be split up. I was wondering what's kind of the "norm" for the average endgame Blue Mage in terms of sets? How far should I split them? Am I pretty much fine with 3 base sets or do I need to go as far as to have one set for every individual spell I use?
Also, what kind of key pieces of equipment should I focus on obtaining and what stats should I focus on boosting for each set?