I would be running lvl 50 dungeons to earn tomes b/c you will need a serious gear and dps check when it comes to titan you see a lot of people saying it's hard, and it is a challenging fight and tougher than anything you've faced up until then. But basically shout groups want you to have darklight armor and either Ifrit HM or preferrably Garuda HM weapon b/c their is a dps check in the heart phase of titan's hard mode. Some people choose instead of farming darklight or the af2 gear to craft or buy some item lvl 70 gears instead...So I hope this hleps best of luck once you make it to endgame.