The design on the shield is a bit cluttered. There isn't much flow, more like just some things on top of the shield. Give it more dimension, a shield like that wouldn't be flat. just move those center edge loops out a little. The chains have no purpose either. Make them wrap around latching the main skull on, or they could be used on the other side for where you hold onto the shield. Do a little photoshoping on top and see how you can integrate things a little more
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Bone low with normal
wireframe
Shield [rough]
Shield wireframe
wireframe:
Wire:
Fun normal test coming in at 910 tris :b