Hi, I've been training KM for a while and mixed it with BJJ, for what I know, since Krav Maga don't have too many ground fight techniques is always good to have other options and what I know is that Brazilian Jiu Jitsu is the best for self defense in ground fighting. I don't want to star a debate about which MA is the best, I'm telling you what works for me, the best advice I can give is that you do a little research, visit some schools and gyms and start training what you think works better for you. Good luck
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"I don't need to fight to prove I'm right"