Since ladder been out for awhile, I noticed that the barrier stones spawn in the same place on the same floor. So I figured it'd be best to post each floor for where the barrier stone are for the classes that have trouble easily finding them or long cooldowns on aoe skills. It'll still take awhile but hopefully it helps.
Note: There will be quite a few pictures since there are 5 floors. It's a wide screen shot since some of them are on both ends of the floor. There are 3 of them on the floors they appear on.
For 111, my wings procced multiple times killing the first one. so I have a red circle giving the general location it's in.

For 111 ladder:

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ID:	1969211

For 113 ladder:
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Size:	894.5 KB
ID:	1969212

For 116 ladder:
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ID:	1969213

For 122 ladder:
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ID:	1969214

For 126 ladder:
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Name:	126 ladder edit.png
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Size:	879.5 KB
ID:	1969215