Here’s my shitty proof of concept for extending Mustafar:
Clearly you can see here that nothing really works with this clip as the video quality of the added shots is very poor as well as the added music.
There are some good aereial shots here, as well as a dramatic take of lava exploding around trees at this point:
https://youtu.be/s1yV1kTrVGA?t=117
Maybe the trees shot, when slowed down, could be used instead of the ring of fire to introduce the forest?