I have a friend who's 5'9", has dozens of bikes, and rides constantly. When talking about short people and overlap his rejoinder is he rides normal sized bikes and has never had one without overlap.
Yes, raise the saddle. When we first tried the wife with the 150s we had not even thought of that, she asked for saddle up after about a mile down the road. By seat of pants it was a 3 or 4mm adjustment. Having since read or heard the opinions of many experts the answer is 3 to 5mm up. Yesterday my friend with 152s showed up to ride with his seat drastically low and was already certain the short cranks worked. When we moved his saddle up he was amazed. Saddle adjustments in past for him only resulted in different flavors of wrong. Now he adjusts and considers and can diagnose the feedback.
Guesswork is guesswork. If 150 does not work for any Rider X it could be because 160 was the correct answer. Or it could be because another 5mm was absolutely required and Rider X needed 145. If you guess wrong at least you know what does not work. Keep the cranks around and let someone else give them a try.
The readily available crank with choices of 150, 152, 155, 160, 165, 170 is Sugino XD. Not too expensive and good enough for most all. Works with 8, 9, or 10 in back. Making it work with 11, or with 5, would not be hard. Changes in gear ratios do not seem to be required.