Thank you for the detailed reply Dr Seow!

I was looking through some iNaturalist observations and this one seems a little different to me with the way the FW post-discal band curves: https://www.inaturalist.org/observations/71003020
Could it be N.pendleburyi? Of course without dorsals it is difficult to confirm.

But it matches quite closely to this observation which was IDed as N.pendleburyi, https://www.inaturalist.org/observations/117297085