Man you have ALOT of un-needed polys in there. The whole thing needs cutting down.

Major problem areas I see are:,

The horns on top of the head,
the holes/dents in the nose area
The handle coming out the mouth
the rim of the lips.

I would cut them way down. Try getting rid of every other line of virts (unless its a crit line) and see how much of the shape you lose.

I`m betting not alot look at those wire frames.

I hate having to cleaning up models (its so boring) but in your case I think it will be time well spent.

Plz don`t take offence.
Your model looks great but the mesh is alittle heavy.