So Sky New Zealand LNB is to tune just channels on Optus D1 on horizontal high band. That means all channels are on the same sub-band and all users can connect to a single output from the LNB via a splitter.
Your config looks correct except "Voltage mode" should be "18V" and "Tone Mode", "off".
In theory you should be able to connect the dish cable to the first tuner and loop to the rest, i.e. B = Loopthrough, C-H = Automatic. If for some reason this won't work with a user defined L.O. you could try a Universal LNB.