Well this is kind of like the mage exploit with soloing the DK wing. They fixed that for the most part and I don't have a instance with Freya up so I can't test it further and honestly I don't want to put the time into it.
Freya Trash-The packs with like 10 little plants and 1 big plant. The little plants pollinate the big plant. The pollinate buff stacks up fairly quickly and it gives him +dmg and + dmg taken modifiers. This can be spell stolen. Sucks ass when you get 10 stacks and start doing 20k dps because you pull aggro and get ass raped.
The next pack you want is the 1 tree dude and the little druid chick. The tree I don't think he does anything special. But the druid chick spams a Ice Barrier looking thing on her and other things. The best I could tell this was absorbing like 500k dmg if not more.
What happened. My guild accidentally pulled like 3 packs. We got 2 packs of trees/druids and 1 pack of big guy and little guys. The 2 big tree guys died and a few of the little plant guys, mostly all killed by me. The raid then wiped.
What the win was? The 2 druid things were spamming that shield and I just kept stealing it, and stealing the polin buff from the big plant. Basically I tanked all of that shit for like 2 minutes until the raid got back.
Stealing the polinate was making my Fireballs hit for like 60k but it also increases damage you take. I checked the combat log and the amount of damage the shield was absorbing was not modified by my dmg taken modifier. So I was being hit for like 7k by each mob. While you have that shield on you you do not get any pushback either so it is free casting.
It was fun as hell. This could be abused big time with some good thinking.
Edited:
http://www.wowhead.com/?npc=33431#abilities
That is the pollinate ability. Thank you Rosulm for your comment. You could more than likely just sit there and off tank the big guy and 3-4 little guys and spell steal it. I mean think about it 40 stacks is +1000% dmg...it could get extremely hi. Also if you are able to drag them out you could take them with you to do boss fights. Wouldn't surprise me one bit to hit something for 10 million stacking 80 stacks of it lmao.