go for more time in SR - temples will take longer to visit than the sights in LP. If you want to cool down in LP head out to Kuang Si waterfall.
i'd also go for the more time in siem reep, to give yourself enough time for the temples and time to unwind and use the pool at your hotel there, 3 full days at luang prabang would give you plenty of time to see what you need to as its very compact and using the falls for swimming is a good option
Thanks for your answers. Yes, we have decided to go that way. Sometimes just writing it down helps your decision.
Less than 4 weeks to go. Can't wait !
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