Pano + Bracketing can work well, even with slow moving clouds like this.
You don’t need to go full manual unless you want to. Aperture priority + Exposure Lock + Back Button Focus is your friend. De-coupling focus and exposure from the shutter button helps immensely for how a make images.
Expose to protect what is important to you, focus on what is important to you. Move to start your pano, careful to remain as still as possible (if handheld). Make good overlaps, the blending and stitching software will do the rest.
Like other's have done, if you cannot recapture this one, you can always add drama to the cloud areas. Would post my result, but it would duplicative. Even so, what an incredible place to do such a capture.
When the scene has more dynamic range than my camera can capture, I try to take two images, one for the highlights and one for the somewhat shadowed area and combine them in Photoshop. Sometime a third midrange shot makes that easier.
