So i am leveling quite quickly in this game and i am just wondering upon hitting the level cap what are some things that are an absolute must at start of beginning the "End Game"

Quickest way's to gear and get up to date and doing the most current content for PvE?

Full darklight (Item level 70Gear bought with Philo tombs)
Crystal tower gear (Item level 80 Gear - 1 drop per week cap)
Binding Coil Gear / Mytholigy tomb gear (Item level 90 gear - 1 Drop and/or Purchase per week cap)

Best is to get full darklight if you wish to save gold, You can buy Item level 70 gear and socket it so it comes out to about level 80 gear but this takes lots of farming or spending at least 100k-200k gil per peice of gear.

So darklight & crystal tower gear will ramp you up untill you can join coil groups and start saving up Myth tombes for the BiS(Best in slot) Level 90 gear.

2 step process. Farm level 50 dutys for tombs to buy darklight gear, Get your Crystal tower drop for the week. (You can full darklight a char in 1-2 days of solid farming)

Then move over to Binding coil / Extreme Primals / Mytholigy purchases. <---- this one can take a while, like most MMO's.

OH, and for your weapon. Hardmode (middle tier) Primals drop Item level 60 / 70 / 80 for all classes. In the order of Ifrit > Gaurda > Titan.
Those are good Sub-weapons untill you finish the Relic quest at level 50 which Gives you the Best in slot Weapon for your class. Item level 80 weapon that can be upgraded later to Max tier i90 with myth tombs.

Hope that helped.

you helped me out quite a bit i appreciate at it!

1 item a week seems a little crazy but i guess that's good for the longevity of the game and not burning you out so quick.

The crystal tower gear is only filler gear to get you to coil. You don't want/need all of it. The way I did it was farm the philosophy/myth tomes in ct till your caped on myth.... 9 runs a week gives you 450 myth and 1800 philo. Grab your left side from ct..... chest helm legs. Also while your doing that go for your relic quest. The only part people have a hard time with is hmm irritated which is the last step other then the 900 philo tomes which is too easy.