Another one with a suggestion:
Epic Kron'zek's Cruelty
+6 Scimitar (2d6 base damage): Shocking Burst, Maiming, Keen, Red Slot
Item for comparison: Supreme Tyrant Greensteel Scimitar of Lightning
+5, 1d8 base damage, Holy, Shocking Burst, Shocking Blast, Lightning Strike, inherently beats DR/good and DR/evil
The Shocking Blast is far better than the Maiming ability, Holy is far better than the augmented base damage of the 'epic' weapon. Then, the Lit 2 has the very powerful Lightning Strike.
'Actually Epic Kron'zek's Cruelty'
+8 enhancement bonus
2d12 base damage
Greater Maiming - On a critical hit, this weapon deals an extra 1d6 untyped damage (as Maiming). On a vorpal strike, it instead deals an extra 20d6 untyped damage.
Keen (just a regular crit profile)
Red Augment Slot