Out of these 4, probably O'Toole just because of Carr.
Vito should glide right through the 133 field.
Starocci also should be fine at 174, although who knows with Mekhi (unless he is in fact going up to 184) in there.
Brooks should have no issues with the 97's currently in the field... now if Ferrari somehow squeezes in there, that makes it interesting.