Aaron, Dr Seow,
I've been shooting lots of alea-subgroup Arhopala recently and several of them have had much wider fw post-discal bands. This one male which I tracked gave me a glimpse of the upperside, showing the fw border increasing in width towards the apex. The fw termen is also revealed to be evenly curved from the upperside.
To cut to the chase, I think this is Arhopala selta.
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