Clare's generation was probably unlucky, if anything.
The 1 and 2 were made in secret by the Organization, so they're Abyssal class.
The #3 has god-like youki manipulation... in a fight, I'd say that she'd slaughter the Awakened that could also control people.
The #4 was just crazy strong. Her 10% beat the awakened former #6 no problem, she de-broke her neck after it got 180'd by an Awakened.
The #5 was a former #2.
IIRC, all the #4's we've been exposed to so far have been known to be strong... strength-wise. Miata can rip basic yoma apart, not unlike Teresa against Rosemary. Ophelia... look at her little section above... And that one girl, I think Sophia was her name. We didn't get any confirmation on her rank, but the 3/4 choice makes me want to put her at #4 because speed > power for me.
I like arguing with people who aren't total idiots... too bad Elcura posted everything I could have with just a couple lines.
@Elcura: I think Clare can be a match, but she'd have to be against someone without a real special ability (Alicia, Luciella, Rosemary)... Against Isley or Riful, though, I don't think the conventional "flash sword in the face" would work.
During the fight against Rosemary, anyone would expect that something was wrong right when she stepped out. She gave Teresa her Black Card, but wasn't crazy or pre-awakening. Also, once she did awaken, Teresa had a chance to read Rosemary then... Though I don't think she NEEDED to use youki to win, what with the twisty straw she turned Rosemary's arm into.