Realistically, how many buttons do you need?

[Frizze]

Thats going to depend a bit on the class you end up focusing on, and how you define "endgame content". For instance, i main as a BLM. Ive got about 3 hot bars of "things" set out. But in a normal level 60 scenario(dungeon, trial, raid), i only actually use between 12 and 24 of them(honestly, id be at least 85% as efficient if you told me i could only use 10 or less). On the other hand, if i was in a hard level 60 scenario(savage raid, extreme trial), theres a few extra that id throw in to be at my very best(for instance, im not someone who uses potions in normal dungeons as they arent needed). The other abilities i have keyed are SO situational that 99% of the time id never miss them if they werent on my bar, but its much easier to use from the bar then a menu when that 1% happens. Other classes will have different requirements.