You will need some merits for the genkai (limit break) quests if you have just returned.
75->80 = 5 Kindred Seals + 3 Merit Points
80->85 = 5 Kindred Crests + 4 Merit Points
85->90 = 10 Kindred Crests + 5 Merit Points
As a recent returner myself, I would suggest pushing to 90 and then working on merits. Full merits at 75 aren't going to break you in abyssea, in abyssea atmas make you broken. IMO is it best to get that 90 by your name so if/when you try to roll with a pickup group you don't get denied by the occasional 85+ or GTFO groups.
Eight forces sustain creation:
Movement and stillness,
Solidification and fluidity,
Extension and contraction,
Unification and division.