Spec on player portrait

[born2slip]

Hello!
I want to replace the my portrait with the icon of the current specialization. And when I change my spec - icon must also changes. Ideally, should be able to specify the IconID yourself, but default spec icon would be great too.
I made WA, but it interferes with the display of the incoming heal, the pvp icon, and probably something else that I can't see now. Whit this post help I removed default pvp icon and made my own. Now it looks acceptable for me, but I would like to do it somehow at the default interface level or something. Any advice would be appreciated.