The Daleks would have completely wiped the Borg out, of course.
That doesn't seem likely. The Daleks pretty much have just one strategy -- zap everything -- and Borg generally adapt to weapons fire after 2-3 shots at most. I envision the Daleks futilely blasting away and screaming as the Borg close in on them -- and assimilate the Daleks
. And then everyone's in trouble.