What is the damage rating your are getting on your shields?

I'm showing 100.10. 5.5[2d6] +7. 13-20x4. This is a crafted plane forged tower shield +5 impact of stunning 8.

My epic chimera's fang is half that! 49.50. 3[1d10]+11. 13-20x3.

If I could I'd make it my mainhand weapon!!!

I'm level 22 pure pali/vanguard in Divine Crusader at this time. Is this normal?