OB1
Jedi Master
I should just say a fall of more than 100' is just death unless you have some kind of ability.
How about, make 1 death save for each 10' you've fallen over the initial 10 feet? Would still very likely end in death for any fall over 70', but just like IRL you could get lucky from even much higher distances.
Monks using their slow fall ability add 5 feet per level to the initial 10'.
Works better if you are using a house rule where failed death saves stick with you through at least a short rest.