Hope you are well. I had a C4/5 AVM which bled.
I was advised that embolism/cyber knife weren't appropriate as they couldn't control any complications that may have occurred during the treatment etc etc. At such a high level breathing and swallow are compromised so that may have been a risk too far for them. They also weren't sure exactly which vessels fed what nerves etc.
I was given the option of open surgical excision or live with the risks. I had my surgery in the UK and they managed to completely remove the AVM at one sitting ( a small bit was left due too the risk of damage getting too high but this withered away over the first week post op ). During the surgery they monitored my nerve responses so they clipped, waited and watched the monitors for 10 minutes and then cut or released.
I'm not what I was but considering the level etc I've done really well. Like you I have leg weakness but also have altered sensation from my neck down, missing reflexes and lack of temperature sensation, and so the list goes on etc., but I am working, back in my old job part time.
Good luck with your decisions. Don't be rushed but be confident yourself with the decision you make before you go ahead. Tx :)