Is there a guide or like a dungeon order of what to do as a fresh level 50?

What is currently the hardest dungeon/boss fight content out there?

Here's a quick walkthrough: http://www.belial.pt/ffxiv-endgame-relic-darklight-gear/

Basically what I did is just do HM Ifrit till you get a weapon then farmed AK a bunch till you cap on Myth, then run CM till your eyes bleed and get Philo ._.

what do you do after you get all of that? just look at the character and do raids? lol curious cause i'm 50 and decided to try other characters so i dont grind for a month and then i just look cool