If you have trouble with fall damage whwn you dismount your bronto, i learned a way to avoid dying when you jump off:
Park bronto near base
Tame a tall rideable creature (parac, diplo, mammoth, etc.)
Park tall dino close to brontos tail
If you position the second dino correctly, you can dismount your bronto, walk down its back & tail, and walk onto the second dino. You can then drop down from this dino and take greatly reduced damage, if any. Hope this helps 🙃
Get you a high lvl bronto and take it to the lunar area on genesis and swipe by the crystal rocks and you'll easily get 1k crystal 3k rocks and if close enough to the wood you'll get a full weight bronto.. put a platform saddle on and make a smithy and you'll make behemoth gates for days..