Opalyn could not be more thrilled with this amount of information! She was quite worried about working from only one reference point and having no idea how far spaced the levels were from here! It is possible that Fdera is bullshitting here, and this is not an accurate accounting of the levels at all, but even having a lie to work with is far better than she expected!
Reviewing mentally: three triplings to get to Count, four more to Duchess, five more to Grand Duchess.
Opalyn's thoughts, hidden from Fdera until the end of this charging session:
How does she want this test to come out, if she gets to pick?
Probably she wants to aim for Duchess, which leaves room for them to poke and prod her and reveal that she's secretly Grand Duchess (if in fact that's true), but in the worlds where she's really Princess or Empress level she wants to hide that.
So she wants to manage between seven and nine more triplings, probably starting to show some strain on the last few of those, and then make it Fdera's problem to reveal any additional available triplings.
He also keeps complaining that they're out of time, so if she can stall enough, she might get dismissed before they get to the end.
No stalling yet, though, it's too soon.