For the reflection and the likes you need a sphere reflection capture.
https://docs.unrealengine.com/latest/INT/Resources/ContentExamples/Reflections/1_4/index.html
As for tangents, those look at the first UV, (and can have the worst seams especially for normal maps) so make sure that thats fine. could you show us an image of the uv map for that texture/amterial?