Managed to dust off the login and come back to CC... Also, I did a WEMT course a million years ago before medical school so I'm biased
WEMT > WFR > WFA, hands down.
But it also depends what you are looking to contribute on climbs/bigger trips. As you get more training you get a better idea of sick/not sick, when to bail due to injury/illness, and how to manage the patient/your partner on the way to better care or a flight out of whatever hellhole you've got yourself in. WFR (and WEMT) training will also help you communicate much better with the rescue teams and convey appropriate & important information that can help the decide between ground or air help, resources needed, etc.
TLDR: If you can afford the time and money, get WFR. Knowledge is power.