Do I really need relic weapon for the maint story line!?

[RemJezebel]

So should you worry about getting the relic for Thornmarch / Moggle Mog? No. Go to your grand company and buy the ilvl 55 weapon. You're going to want to use that to get through the primals anyway.

Should you get your relic before trying the other post-50 dungeons that require an ilvl of 60+? Yes. You can run Garuda, Ifrit, Thornmarch, and Titan to get ilvl 60, 70, 75, or 80 weapons but the relic is the best way to get an ilvl 90+ weapon.

This is all true. Getting a Zenith Weapon is the fastest way to get ready for ilvl60+ dungeons however the primal weapons can also help out a lot