My suggestion would be listen to your mates on this one.
Both species can be very dominant and the likely hood of a real nice munch on one another isn't worth the hassle in my opinion.
A number of years back I tried 3 juvenile EWD with 2 juvenile EBT and the outcome was a tag team on one of the EWD by the EBT only saved by the fact I was sitting on a chair watching the whole time.
How do you reckon a Beardy thats more defensive than an EWD will go with an Accie that's far more aggressive than a Bluey??
Cheers,
John