Last year I went to Bali for a couple of weeks, shot my vacation video (here) almost entirely with the Samyang 12mm f/2.0 NCS on APS-C (equivalent to 18mm on FF). For me, 24mm is nice and I use it a lot, but 18mm is even nicer. YMMV.
So you say the wider, the better on such trips? Batis 25mm is also 67mm, I would need less ND filters to buy and no need for any adapters
Stabilised in post?
https://www.youtube.com/watch?v=RpxfJpJy9NM&feature=youtu.be&t=84
Sky is not blown out, must be slog2? When I was in Bali this summer, I was too lazy and shot everything using Brandon's Li settings
On a side note, I read that you could a similar dynamic range as slog2 if you shot in cine4 and lift up the shadows, is that true?