Messing around with the spreadsheet, tested average Exenterator damage with some combinations of head/body.

~561 attack
1) Ocelohead+1/Toci's => 1359
2) Ocelohead+1/Athos => 1356
3) Cuauhtlihead+1/Athos => 1355
4) Ocelohead+1/Denali => 1339

~654attack (Bison Steak)
1) Ocelohead+1/Athos => 1606
2) Cuauhtlihead+1/Athos => 1601
3) Ocelohead+1/Toci's => 1595
4) Ocelohead+1/Denali => 1583

I found the results surprising, wasn't expecting Toci's to perform that good.
Oh, of course these are the results with my setup, which is far from being optimal.
Here are the details of the rest of my gear:
Main: Lux Pugio
Off: Twilight
Ranged: Thew
Neck: Houyi
Ear1: Brutal
Ear2: Aesir (@low attack this is ok, @higher attack rates even a +2 agi performs better, so goes without saying that +3agi or +4agi should be the winner here under all conditions)
Hands: Charis+2
Ring1: Epona's
Ring2: Solemn
Back: Atheling
Belt: Anguinus
Legs: Tumbler's
Feet: Athos

As far as the spreadsheet goes ALL buffs were turned off except for Haste Samba (which doesn't affect WS damage anyway), 12/12 STR merits, 0/8 Dagger merits.