Even though we weren't planning initially to go for Fel Lord Zakuun, the raid comp available suited him better, so we ended up giving him a shot. Good thing we did, because in all honesty, he was quite easy. The tactic is pretty straight forward: soak and clear you debuff if you're assigned to it, place the seeds in the correct positions, defend the pillars and the people with latent energy in p3 all while nuking the boss as hard as you can. Oh and if you are a mage, you get to be the hero who puts him/herself in harm's way in order to protect the raid sometimes at the cost of your life.
Next stop: Xhul'horac!