After literally minutes of screwing around and wasting time at work, here is my list of the best rotations for single target DPS for each Job:
WHM - Auto Attack > Auto Attack > Auto Attack > Sprint > Swiftcasted Regen > /mdance > /changepose1
SCH - Summon 1 > Summon 2 > Summon 1 > Swiftcasted Summon 1 > Summon 2 > Virus > Eye for an Eye > /p I'm stupid
*You can even macro this one for MORE dps!
PLD - Flash > Provoke > Flash > Rampart > Conval > Sentinel > Hallowed Ground > Bloodbath > Skull Sunder > /sit > /shout Meow Mix!
*Requires you give up cross classing Stone Skin for Skull Sunder because you can't give any of the other ones up - and you can only have one cross classed skill that starts with "S."
WAR - Overpower > Overpower > Holmgang > Overpower > Sprint > Try to run away but rooted > Root wears off > Run into AEs/the wall > Get rezzed > Overpower x infinity
*Don't worry about running out of TP, if you get to 0 TP and can't use skills its actually a DPS gain.
NIN - Huton > Kassatsu > Fail Mudra Check after trying the maximum number of times > Assassinate (just keep trying until it works, no one knows why it doesn't work sometimtes) > Dancing Edge x50
*Dancing Edge is your most powerful skill because each time you use it by itself it makes you do 10% more damage, so by the 10th attack you will be attacking for 2,900 potency!! They need to nerf NINs!
MNK - Mantra > Bootshine > Bootshine > Perfect Balance > Steel Peeks > Howling Fist > Fists of Fire > Fists of Earth > Fists of Wind x3 > Bootshine > Bootshine
*Make sure you do all of these attacks from the front of the mob for best results!
DRG - This is a cool one, and a trick most people don't know. Just keep using all of your jumps whenever they are off cool-down. Here is the trick: If you get hit by an AE or an attack while jumping, you actually heal the party for that amount of damage. This is so cool that it will make everyone jubilant and pleased with you, and cause them to type "loldrg" at you!
SMN - Exact same as SCH rotation except add Miasma II > Bane x3 before you do anything else.
BLM - Flare. Its your highest attack so just keep using it, everything else is a waste of time.
BRD - Not a lot of people know this but BRDs don't actually do any DPS or have any abilities, they are put into most end-game groups to cheer everyone on as they do the encounter. You should make a lot of Macros that encourage your teammates. The best BRDs will macro the above rotations to help everyone remember how to do their optimal DPS.
Hope you enjoyed my guide!