Both the sticks on the Futaba Skysport 6 are two axis sticks so yes, you can use the right stick. You will need a mixer for the speed controllers. Im one of the 1% who uses 2 stick steering so I took my Skysport into the shop I bought it from and they took out the restricter on the left stick and installed a spring so it returns to center the same as the right one does. Took them about 10 minutes.

Since you are planning two active weapons you really should go for one stick driving to leave the other one free to operate your weapons.