just put down as may mantra rops as you need, set each one to a different camera, and in the scipts tab of your mantra rops, in the post render script parameter, enter “render” and the name of the rop you want to be rendered after the current render job is finished.
in rop: “mantra1” enter “render mantra2” (without the quotes) in rop: “mantra2” enter “render mantra3” in rop: “mantra3” enter “render mantra4” in rop: “mantra4” enter …..
Easier than that just put them all in a subnet and press the render button on the subnet. It renders the first frame from each mantra, then the next and so on…
The trick is finding just the right hammer for every screw