since those are 750.1's, personally i would do two runs of wire, but it would also work fine to run 0ga. back to the amps, then use a distribution block that splits off into two runs of 4ga.
with the remote wire, run the main wire to the first amp and then a second wire from that amp to the second. Rca's if you have an input and an output on one of the amps, run the rca's to the input and then run a second set from the output to the input of the second amp. if your amps do not have a output, then you will have to buy y splitters for the rca's
^yeah you're right. i totally forgot about the master/slave settings on some amps. you can run one set of RCA's and remote wire to one amp (master) and then run an output set of RCA's and remote wire to the second (slave) amp. i'm not totally sure if you do that with the remote wire though, but i can't see why not...