Rocl shouldn't you stand inside discoid range ^^
The only real skill in this game is knowing about game dynamics. As people have said knowing your job and more importantly others is key, knowing how mobs pop, what moves they have, how to navigate zones, organise people through salvage/limbus etc . I'd also say you need to know how to make gil at at least a steady rate, waiting for a speed belt/k club drop isn't steady.
I would happily call anyone advanced if they combined that with the ability to turn up to any event/merit pt/hnm as a useful job with effective gear. You dont' need to have more than 1 job to do this, but if you do only have 1 job make sure its versatile enough to add benefit.
Effective gear doesnt' have to be super rare drops but if they are missing know how to gear around them.
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