We use both an OT and MA. The job of the OT is to grab all adds as they spawn/arrive at the fight, and the OT never attempts to engage Vuulan. The MA is responsible for directing dps, whether it be towards Vuulan or any adds the OT has picked up. All dps should be through the MA, no one should be targeting Vuulan directly.
We also designate alternates in case the MT, OT or MA go down and someone needs to step in and take control until they are back up and able to direct the fight again.
If your raid force make-up allows it using 2 OTs is another option, so when the 2 'a dracurian wizard' spawn each OT can grab one while the MA directs dps, or if one of the 'strange hatching eggs' clusters actually get to hatch you can have one OT grab them while the other stays on the wizards, again, the MA directs all dps.
On this guy is it best to have a MA or just burn adds down with AOE's or just have a few people work on killing adds?
If you heard about this strategy at FF from one of the devs then I would have to agree that it is not an exploit. We have been using both methods, porting the eggs and destroying the eggs, in our raids, just for practice to get raid movements down for harder encounters. Nice to hear that you were present when a dev said to try that strat.
I don't believe the porting of the eggs is an exploit, however some people may disagree. I actually heard of this strategy as hardmode Toxx was being discussed at fan faire this year, one of the developers suggested we try "moving the eggs". If it was an exploit I think they would have fixed it long before now. Other classes can move the eggs as well, but the Warlock teleport works best for its quick reuse.
If you do not want or can not port the eggs I recommend a ranger to kill them, as they can nearly oneshot the eggs and stay out of range of the mobs aoes.
No, the person on the eggs stays on the eggs, unless you are using a Warlock and he teleports the eggs. If that is the case, once all 4 sets have been teleported they will no longer spawn and he/she can return to helping dps down Vuulan. Be aware that using a Warlock to teleport the eggs is an exploit which will be fixed so it is best to practice dpsing the eggs rather than teleporting them so that when you start attempting the zone in hard mode you are not caught unaware if the exploit has been fixed and teleporting no longer works. Also use 3 groups on Vuulan instead of 4, again this is for practice for the zone in hard mode as 1 group will be on Toxxulia during the hard mode version of the encounter. Also, the 2 spawns from the eggs will only occur if the eggs are not destroyed before hatching. If that is the case you may want to add another dps to eggs duty. The adds from the eggs will stifle/stun your raid force and could result in a raid wipe if not killed quickly or too many sets of eggs are allowed to hatch.