Ok numbers for a Kensai 2, +50dmg mod including +5 weapon, +10 seeker with bloodstone (+6 and +4 kensai) with 1 dragonmark feat.
Current Chimera's Fang
91.83 = 75.3 + 16.53
New Chimera's Fang with 1 Dragonmark feat (+7 instead of +6 and BS prof.)
87.2 = 82.78 + 4.43
New Chimera's Fang with 3 Sentinel Dragonmark feat
101.38 = 86.23 + 15.16
Lit2 Khopesh
107.4 = 80.93 + 26.48
Even though the Lit2 is ahead, +5 to hit and destruction would put the Fang's ahead by a substantial amount if you are not already hitting Epic mobs on a 2-5+.
Also unless you take all 3 feats, the current Chimera's Fang is BETTER! The lit2 strike without feats does this.
I wont bother comparing vs Devil bosses, it is pretty obvious.
I will compare to Epic Brigand's Cutlass though (for Devil trash or a pure Pally).
Epic Brigand's Cutlass (+6 seeker only, assuming not Kensai specced)
97.55 = 76.1 + 21.45
What happens if I calculate Kensai 3 with +1 crit range and +2 crit damage?
The Cutlass's for a Scimi specced Kensai3 become:
105.78 = 83.8 + 21.98
and the New Chimera's Fang with all feats becomes:
107.51 = 91.8 + 15.71
or a Halfling with Healing dragonmarks Kensai3?
101.51 = 85.8 + 15.71 (removed 5pts per hit, 2 less for non sentinel feats, -3 for no WF PA)
Lit2 takes a massive jump at Kensai 3
117.05 = 89.48 + 27.58
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But vs Hard Devil bosses Kensai3
Lit2 Khopesh
74.93 = 47.35 + 27.58
New Chimeras Fang all feats slotted with Good
90.19 = 74.49 + 15.71
Epic Brigand's Cutlass 20 Pally slotted with Silver
87.05 = 65.6 + 21.45 (without capstone dmg)
97.02 = 65.6 + 31.43 (WITH capstone dmg but not KOTC)
Very very interesting