P.S. When I was doing this, I didn't bother, I just didn't think about it - I thought that as it is now, it's quite enough for Heroes 5... as well as some angularity of the models...
Added 3 minutes later
Yes, by the way, one more thing... anticipating the future - if we're going to "develop" the Gloomfang in the direction you're talking about - blinking eyes, eyelids, etc.... then it would be better to create a new model from scratch, like the one in the picture (the one you showed at the beginning)... and we can leave the basic animation of the Cyclops as it is, I mean the movement of this head...