Normal, bump and displacement. In that order.

But it is easy to fool the eye from an exact front position.

For what it is worth?

I experimented with procedural bump and displacement and ended up "releasing bump", maintaining only displacement.

Combining the texture and a procedural displacement, and driving the displacement by the texture.
On the wrong PC right now, but I will try to post an example with explanations of what I am talking about ASAP.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!