Nice to see you back Verengor!
The ones I am using for the calculation are +5 Holy of Pure Good with Icy Burst (Wraps I already have). As you stated the Greater Banes are very situational but when people do the DPS calculations then they make it a best scenario most often.. ie rangers get to use their favored enemy (ie monster build only has 2 favored enemies) and we can clearly see that the amount of different kinds of mobs are increasing (I have seen mobs getting their type changed in the last patches). So that would not either be a perfect fair calculation to the damage but they still uses it. I myself choosed to use the handwraps that are working against the majority of the monsters out there.
Yes Halfling is also an excellent choice for the Dominator build too no doubt about that... More a matter of preference... as you said more sneak attack less PA and Str. Halflings also get +1 to hit and +1 AC. Warforged gets the immunities (immune to poison, disease and negative lvls <--- really hate this one). The immunities and the fact the PA and 1 extra damage due to str is a damage that is working even though I wouldn't be able to sneak attack.
So more of a personal preference indeed...
Would love to have a halfling dominator build along my side (especially if he has halfling heroic companion)
Maybe you should roll one on Cannith Verengor (would love to party with you)
Cheers!
/Khierra