Yu'lon easy mode (dps/tank spec)
do this, and you'll love me after
- When you engage Wrathion just focus on avoiding damage in the begining, dont use your cd's instantly. When adds spawn, run out to the balcony ASAP but before that use and ability that lets you drop aggro (for mages invisibility, priests fade, etc)
Now the best part comes: adds will now go back to the center of the room with the gong. You will never see them again and won't have to worry about them

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- Now's time to hurt Wrathion, just keep in mind that you never leave the balcony and don't go too close to the stairs or the adds will start chasing you again. So, avoid damage and do some dps.
- At some point (25% health) Wrathion will go back to the gong room to summon his mirror images. DONT FOLLOW, stay where you are, and heal yourself (glyphed invo for mages)
- After while all mirror images will drop dead, Wrathion will come back, so again: avoid damage and do your dps (just dont go near stairs)
If Wrathion goes again to summon his mirror image (that happens if you are like me lfr geared), again you stay there on balcony, heal, and dps him when he comes back.