Well for Final Fantasy, hitting the bare minimum is very easy (and boring) thanks to all those lock outs.
At min., you want to do the following every week (easily achieved):
1. Cap Myth (time grind, do 1 daily high duty daily)
2. Get CT gear (pray people do not suck, once a week per item)
3. BcoB T1~4 (might need to find good group)

That is seriously all you need to do to keep mostly up in the ilvl race.