Tupirr, far east is perfectly compatible with synergies but your mod load order is not correct. For these 3 mods it should be:
as opposed to the order you have them in now. Hope this helps to avoid future weird behavior!
This is not a weird behaviour. It's the normal icon of an armor in Far East. Nothing more normal, really
Or at least, I've always saw this icon when playing Far East.
You could play with just Far East mod and still have this icon, because well that's just the icon they assigned to their armor, nothing more