Crickets will always eat each other so wont hurt either way. Some roaches do better with others and some dont, but if not breeding then its also fine. Just not roaches with crickets.
For dubia and red runner, it depends what your purpose is. If to establish colonies of both then I wouldn't. Red runners lay ooths that may be eaten by other roaches. One species might also stress out the other. If you're just trying to feed them all off within a few weeks then they should do alright together.