Seems a bit wrong suggesting this on a mileage run, but if cost is moderately important and you still want to take in KL then you should seriously consider taking a luxury coach.
Punki and I have some Singaporean friends who made this same suggestion when we met with them in Tucson last month, so the luxury coach was our original plan.
In true FlyerTalk fashion, however, we were swayed to flying first on SQ and MF so we could check out their respective first-class lounges and, thereafter, be in a position to properly compare them with the UA RCC.
BTW,
mjm, we will probably be spending Sunday evening with our Singaporean friends and not make the night safari.