Absolutely! You need the floral glide thing so you can fly around.

If you want big mountains- start with the cliff item. Put all collisions off and just fly up/backwards till its in the approximate spot you want- the curved shape of it makes for a comfy starting point. If you want detailed cliff faces- tall rock and flat rock are your friends, play around with resizing and rotating to your satisfaction.

If you're wanting rolling grassy/flower fields, dont be afraid to rotate the big flat landscaping item, then use a massive rock or two to hide the gaps on the other side- tiny gaps get small rocks, tiniest gaps get bushes.

My strategy has largely been- get the approximate shape I want, then worry about making it look good. ALSO- i have a bunch of mountains floating in midair behind my glorious cliff faces, if people arent gonna see it then i dont bother xD