Choose anchors, not a checklist
Start with Royal Palace and build outward only if the day still has room.
- Anchor the day around Royal Palace or Silver Pagoda.
- Keep Wat Phnom for the right weather and timing.
The strongest attractions plan in Phnom Penh is selective. I would make Royal Palace the first anchor, add Silver Pagoda or Central Market if they sit naturally nearby, and save Wat Phnom for the right timing instead of forcing it.
The practical rule is simple: Royal Palace and riverside first, Central Market nearby, Tuol Sleng as a separate respectful block. That keeps the day grounded instead of making it feel like a loose checklist.