I think taiwan or thailand difference not too big right? In terms of photography. Personally I brought 18-200 and 35 f1.4 along. 18-200 for street shots or impromptu shots and also landscape. 35L for low light, portrait.
Sometimes 18mm is not wide enough for landscape but it is still possible by taking pano shots in portrait orientation at around 30 - 50mm.
I think the most impt thing is to forsee what photos you are going to take, and learn of ways to overcome with the 'weakness' of your gear.
I bring my tripod and use it when the part of the tour I think using a tripod is realistic. E.g. if I am visiting night view of various sceneries and I have space and time I can setup my tripod for night shots, or when I am taking photos with my buddy/gf.
However if I planned to go night market which is crowded then personally I see no pt in tripod. No space to setup, your tripod is going to hit ppl who squeeze past you, etc.
What to bring what to use depends on what you are doing, where are you going for each part of the tour and this is something you know best, and learn best during your holiday trip. End of the day the important thing is to enjoy your trip.