What do you mean by workaround? What kind of workaround?
I found your psd on the first post you made and opened it. I see no white halos, square, or border.
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Have you considered something like this. I'm getting the impression you want to stay with you original idea. This version does reduce the glow on the triangles but there is a simple way to bring it back on the outside points. Inside, it obscures the letters and you may have to decrease the layer opacity more or increase the strength of the layer effects for the letters to pop. I increased the layer fx in the last one a bit but you could go much further on the satin and the gradient. Did you know, btw, that your inner glow and stroke cancel each other out?
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