Proving Yourself: Gold Tank

Had alot of trouble wave 10/10 as guardian druid, since the 2 Large Illusionary Conquerors hit for like 75k each, tried kiting etc but that wouldn't work because of the 150% more movement speed. But I then noticed you can change talents whenever, as long as you're out of combat. Switched from Pulverize to Guardian of Elune at about wave 8/10, and when those 2 Large Illusionary Conquerors came I used berserk, spammed mangle, and activated both of my Savage Defenses so I couldn't get hit at all during their berserk for 6 secounds. When it ran out I popped survival instincts, barkskin and a mastery trinket just in case, and that talent was the only missing part for my gold achi.

Talking from the perspective of a warrior here.
Bizarrely, I found this easier at level 100 than at level 90, despite the removal of important survival abilities like Demo Banner and Rallying Cry. Some more specific tips I can give are:
Enraged Regen is a must. The other two talents are terrible for PG. Second Wind is a joke anyway, and while Impending Victory heals for the same amount per minute as Regen, you cannot use it while stunned. Sometimes the hitbox of the Conquerors' (large Mogu) slam will scumbag on you and you'll be hit even though you shouldn't have been - in these cases ER will save your bacon.
Ravager and Anger Management are both decent. I prefer using Ravager in conjunction with Bloodbath for a lot of damage + mitigation, but Anger Management will allow you to be more liberal with your use of cooldowns. I nearly died in round 10 because all my abilities were on cooldown, so AM might definitely be worth checking out, especially if your gear isn't very good and you don't have a lot of mitigation (crit, mastery etc).
Glyph of Gag Order and Glyph of Spell Reflection are amazing to help with the damage from the Flamecallers. Being able to reflect the pyros they throw at you more often helps a lot. Try to abuse the lava pools to make all the mobs take more damage.
Apart from that, I can only recommend you practice a lot and zoom your camera out as far as possible - the last thing you want is to miss a mob whaling on your healer.

I get really frustraded, Always i get at wave 10 not too hard, but then i Always die nearly instantly.
even with all my CDs up as pala tank i Always get like 1 shotted in 2 secs if those crazy big fks attack me in beserk.