Edge with certain counts

[Ulysses]

OK, here is the scenario.

Basic hi-lo count. No side count.

Standard rules (w/ dealer hits soft-17) at the Venetian, multi-deck (6 decks or whatever it is). Looks like she put the cut card a little bit too far back, so penetration will be a little deeper than normal, but pretty much normal.

There is about one deck's worth of cards left to be dealt. Three players. If the count is +20, +25, +30, is there any way to quantify the edge? If so, what are the percentages for those counts. Or is this impossible without knowing how Ace-heavy the deck is?