I don't understand...

[Cap75]

And even then it was more about surviving than aggro managment. As a GLA/PLD it is very hard to tell if you are handling aggro right or not, because it always seemed like you would lose aggro to level synced DPS before you get shield oath at level 50. See:
http://forum.square-enix.com/ffxiv/t...arning-to-Tank

You get SO at 40. You have it in SV. And being a tank is always about aggro management. I don't care what your level is.

[Kerberon]

You get SO at 40. You have it in SV. And being a tank is always about aggro management. I don't care what your level is.

Yup that's why you mark, then as a pld, flash a lot. shield lob/flash x2 or 3 depending/fb>sb>roh/flash/fb>rb/flash/fb>sb>roh/repeat never had problems except when someone went crazy on a 2 or 3 target with single target attacks. That was without shield oath, shield oath has just made things so much easier. It takes a bit to get used to how much you need to flash with aoe heavy groups compared to the skill sets in other games but by SV you should definitely have it down. I have marking assigned to the extra buttons on my mouse so that the marks go up in half a second or so before the pull.

[Foo01]

You get SO at 40. You have it in SV. And being a tank is always about aggro management. I don't care what your level is.

Yes typo, shield oath at 40. No it is not always about aggro management when you can not take the hits. There is no aggro to manage when there is no tank alive to manage it.

I've even had SMN put up topaz/titan to help and/or have the tank heal tank sometimes just to survive stuff. There are many ways to solve the problems. There is no specific narrow path that you need to follow like "always about aggro managemnet" or "always maximize dps" etc. This is not the elitist way, but this allows players to play together and get along and make things work.