In the forsaken base on many maps, there are columns that are not seen from the actual room. You can shift into from standing basically anywere around the room. The way I do it is stand on the alter and jump and shift as fast as possible. It helps if you have a double shift bind. (Contact Excaliber or Vitaly of you want to learn how to make a double shift bind) If you stand on the alter, you look around the top corner of the room. There are usually 4 columns in each room.
You shift here...
There are alot of maps that have these columns... The maps I know that have them on the forsaken side are Heresy, Stench of Decay, Ringfinger, and Shatterd Hope. Now Aes Sedai has some columns also. They are harder to get into by the inside room. They are on Bone Orchard.
The Column edits in the TA room on Heresy WhiteCloak
The Lamps in Aes Sedai Secret Room on Outposts
The Lamps in Forsaken near alter on Outposts
The Lamps in Forsaken Secret Room in Heresy
The columns located in the Forsaken base
A Shift to the Column on the Aes Sedai Roof