I just realised the hobglob may have had 1 pt more dmg than it was meant to in my calcs, and the disint may have been left off the new eCM. Anyway below numbers are double checked

0% no DR (Trash)
Epic Chimera's Fang = 100.9 = 85.65 + 15.25 (3d10 base = 107.23 = 91.98 + 15.25)
Lit2 Khopesh = 114.15 = 87.68 + 26.48
+5 Hobglob = 108.35 = 91.73 + 16.63
50% Fort, Good and Silver DR (15)
Epic Chimera's Fang = 91.8 = 76.55 + 15.25 (3d10 base = 97.58 = 82.33 + 15.25)
Lit2 Khopesh = 84.8 = 58.33 + 26.48
+5 Hobglob = 92.65 = 76.03 + 16.63
100% Fort, no DR
Epic Chimera's Fang = 82.7 = 67.45 + 15.25 (3d10 base = 87.93 = 72.68 + 15.25)
Lit2 Khopesh = 83.95 = 57.48 + 26.48
+5 Hobglob = 76.95 = 60.33 + 16.63
In conclusion, if you do not have to hit issues, the new Epic Chimera's Fang is gimp.
Lit2 or crafted is the way to go. If you have to hit issues, then you are not a Blitz or 18 fighter, and probably can't fit the feats in anyway.
Big MEH.