I soloed this as an 86/1350 Wizard with a J5 tank merc. Wasn't easy, but I was determined. FWIW, I do have the Iksar illusion, so I was non-KOS to the entire zone.
The greentails and tower guards appear to be on the same spawn table so depending on where you choose to fight you may need to clear some guards. Obviously with neither crowd control or a healer, I needed singles. I found that most staircases have a single mob that roams from top to bottom; if you engage this mob halfway up the staircase, it will not aggro the mobs at the top or bottom.
The easier spot though is the west side of I think the 5th floor. It's the green level if you have the mapfiend maps. There is a room with two spawns, and a room behind it with one spawn. If you want the easiest but slow way, you can just kill that single spawn point. The zone seems to have roughly a 20 minute respawn though, so you'd be there for some time. I was able to handle the two spawns in the outer room by rooting the further one and burning the closer one that the merc was tanking. Then while waiting on respawn I would check the various staircases.
The same area with the single spawn has enough room that if you were REALLY determined to kite this, you might be able to. There are two roamers in the hallway, with an empty room to the North. If you can root one roamer out of your way, the other should be kitable, then you can go back for the first one. It's much easier to use the merc though, as they can tank one mob without a healer without too much trouble. The mobs are stunnable as well, so that can help.
Hope this helps...
Endaar Flaashpoint