Elektra is at least as skilled (and thats undercutting Elektra )as Lady Shiva, physically superior and has telepathy and a whole slew of ninja mind tricks.
Daredevil is as skilled as Batman, slightly stronger then Batman, as fast and agile as Nightwing and has a radar sense.
Bullseye can easily tie up Batman for long enough for Elektra to finish Shiva and as long as Daredevil concentrats solely on defense and evasion he can easily stay a step ahead of Cass (if he decided to go melee he'd only win 4/10). The marvel team gets the slight odds in this fight, if Bullseye was replaced with an A list MA then it would almost be a clean sweep.
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Elektra is better than Lady Shiva? Ok... sure. Right.
Daredevil and Batman would most likely go 5/10 each in an h2h fight. However, Batman has quite the assortment of random gadgets, while DD has a baton. Flashbang, batkick, game over. I realize that's far from foolproof... but gadgetry puts Batman a notch above DD, IMHO.
Now you say Elektra beats Shiva... I disagree. This fight probably has a significant impact on how the whole thing turns out though...
Batgirl can take Bullseye. Or switch with Batman and have him take Bullseye, though as you said, he could avoid her, but would definitely not win a majority. Batman takes Bullseye a good amount of the time though, as does Cass. If DD stalls for time, the Shiva/Elektra fight completely determines the whole outcome in this scenario... If he loses fairly quickly, the Batfamily wins.
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