Real PvP can we have it PLEASE S.E

[Jackaverted]

Sleepga is used because not only does it wipe shadows, but it also cause's the sleep status effect. Even with a DoT on it will take one game tick to wake up, meaning that for approx 3s your standing there slept. This gives the RDM time to apply silence / paralyze to block reapplication of utsusemi and to force you to go onto the defense. After you wake up the RDM's next move will be Sleep 1, followed by bind or grav.

If your intent is to wipe shadows, as a Red Mage you have Diaga which has a casting time of 1.5 seconds (half the sleepga casting time) for 12 MP and a very quick recast timer. Because of that, you shouldn't need to worry about landing Silence /immediately/, instead your first move should usually be Gravity. Even if you silence an opponent that relies on shadows, they can just flee away in attempt to waste the duration partially. With Gravity they cannot flee away, nor can they get close enough to you in order to start pressuring you into defensive action. This is also a wonderful time to implement Saboteur, as it enhances Gravity to the point of near-immobility. And if they get shadows up again, oh look Diaga is back up and now all shadow timers are down, allowing for enfeebling without needing to immediately silence. Addle+Slow combination sends recast timers straight to hell. Or, you can even Diaga > Break (since the DoT damage from Diaga does not cancel Break) and have enough time to land every enfeeble you wish.

Then it turns into a slow drawn out kiting match where the RDM is keeping you debuffed (silence / para / slow / poison II) and leeching your HP away with Drain / Aspir. Eventually you will die, it's only a matter of time. Sab Poison II is 20hp/tick, followed by Bio II for 5~6 and three of the ele debuffs for 5~6 each. That much -HP/tick is going to kill even the Aegis PLD tank from earlier, the one that sat there and had a HF VS MNK beat on him for five min while disengaged.

DoT kiting is also not a very reliable option for PvP. Even if you can successfully keep a target away from you for a while, resistance to Gravity/Bind would skyrocket too quickly to be able to maintain distance for fifteen minutes. There is really no "eventually," the longer the fights last, the weaker an enfeebler will become. To be honest someone could even allow a Red Mage to kite him at the beginning, just to build resistance to major enfeebles and be able to attack without being impeded.

Sab Poison II is 20hp/tick

What is this, I don't even.