what is better for endgame?

[Lev_Decimo]

Quit beating a dead horse like a necrphiliac.

This got me. ^^

But to the OP they are both great. DRG has lower DPS, but their burst is nice. If your looking to see number 1000+ go DRG they also dont have that bad of a ramp up. MNK is my main and I love it. The high sustain is wonderful in coil. although MNKs ramp up is about 9 gcds (I dont count pb as your going to see it once per fight usually) it can take some getting used to and seeing -greased lightning III pop is always frustrating. In the end both classes are a lot of fun and you'll play better and have more on the class you like more give them both an equal chance.

[Darkseth]

on drg vs mnk rotation, tbh i found the Mnk rotation much much easier.
Its more constant. Basicly only: 3 Attacks from Flank --> 3 Attacks from Behind --> repeat. Throw ToD anywhere inbetween when it runs out, use buffs and your 2 off CD attacks.
DRG's Buffs and debuffs have a different uptime, so you have to adapt more, when you want to maximize your dps and dont want to clipping dots/buffs too much. Plus, more off CD attacks.
In addition to that: If you fuck up DRGs impulse drive from behind (because boss turned), you have to restart the combo. On Monk you can do your combos from any place, and "only" lose some dps. which is the higher dps loss, i cant say, as i dont play melees much. But i found the Monk rotation easier. (also on Dummy, my equally geared monk deos like 50 dps more. Mnk NOT BiS, alot crit in gear. DRG is kinda BiS 2.1 with moogle neck too (like full det))

[Marxam]

It basically boils down to what you want to do in terms of damage:

Burst: Dragoon
Sustained: Monk

However Monk does kick balls in long fights, especially in t8 or in battles where the boss is stationary.