Need help with MNK class

[Almalexia]

Let's assume a 1.99 GCD which is pretty much ideal for using True/Boot.
Your regular 12 second rotation.
DK/Twin/Coeurl/Boot/True/Coeurl
The same rotation for ID is
DK/Twin/Coeurl/ID/ID/ID

So we're really comparing IDx3 vs Boot/True/Snap
This turns out to be 540 Potency vs 522.5 at 0% crit and continually scales up.

If you start adding in Fracture and HoD, a rotation of for non-ID turns into
DK/Twin/Coeurl/filler/DK/Twin/Coeurl
or you risk losing buffs.

If someone could actually--not theoretically--pull off 6 skills on GCD before GL expires, you may be on to something.

But it doesn't make sense to only use DK and Twin in a non-ID rotation. You have plenty of time to spend one rotation on DK/Twin and a second rotation on Boot/True. Sprinkle Fracture and ToD as appropriate; you don't have to apply them on the same rotation.

Take that 1.99 example again: In 12 seconds, you'll be able to make 2 complete rotations, so you'll be back on Twin Snakes where you started. Twin's buff lasts 12s. Dragon Kick lasts 15--no problems there.

And I don't understand how using non-MNK rotation skills makes it easier to keep buffs up. You don't get any form change for using ID and you certainly don't get any +% bonus.