I was messing with beams and figured out that there is the Beam Reflector that focus few rays into signal one but there's no block that is able to split one rays into few.
Wire vs Beam, that depends on my builds(I am primarily a builder type player). Although I stopped using beams a long time ago, because there was a chunk reload issue with them connecting to things properly and I would have to go back and reset them the way I wanted/needed. I'm not sure if it's been fixed or not though. I really like the idea of Reflector working on multiple outputs, something like Draconic Evolutions power crystals would be super cool, using the wrench to "bind"/connect the beams to reflectors and receivers.