The 3 things u need for this place are a Mage(ice-specced), Priest, and the Key to the City.
2 Drops that most will want but there is a +22 dmg/healing by spells neck piece, but main 2 are:
http://www.thotbott.com/?i=53595 -Waistband of Balzaphon
http://www.thottbot.com/?i=53574 -Staff of Balzaphon

This guide is for killing Balzaphon the new boss in Strat. This can be easily done by 2 ppl.
First is where the hard parts come it, aoe. Have the priest shackle pull one of the elites, and then go around corner and use Line of sight pull, once there, mage frost nova's starts the aoe process, now there will be 2 elites roughly 1/2 healht down, and have priest dps em till dead, reshackleing the first one at that time for safety.

Then go to the left side near fountain, and attempt 2nd pull, watch out for ghouls and such, so that the pull is seemless, w/o problems(note: if pull goes bad, just run out and come back in, and attempt again). Then pull the 2 ghouls and the larger one, which patrol the area(this is where frost mage is best as they can kite the large elite, u dont want to just have the elite hit u as from lag or something, he did 1800 dmg in few secs on me, so kite em till dead), then shakle pull again the 3rd aoe. If you have pulled the 3 patrols first, u can shakle pull, if not, have mage pull, and shackle in the tunnel. Then the boss should be alone and ready for killing.

Killing the boss is easy, as a frost mage with lots of frost armor protection+coldsnap, its really easy to kill em as he uses frostbolts for dmg. Just go near the right side near a crate past Hearthsinger Forresten rare spawn(yes if he spawns u can easily kill em as well, little harder then balzaphone, but just as easy to do). The boss also drops 2 corrupter stones, nice bonus for the Ad grind now.