Hmm, if you've stalled a bit on the Buhner herbs you could try rotating in some other herbs. Personally I like Zhang brand allicin (I also like Pure Encapsulations Garliactive), artemisiae, houttuynia (this one is for bart), nauclea latifolia, neem. A-bab is effective for quite a few people but can be strong. Oil of oregano capsules are nice because they are pretty broad spectrum... Lots of options out there, can take trial and error and strategic rotations whenever we stall with treatment.
I've had to throw the kitchen sink at my babesia to keep knocking it back. Has taken some time. It's different for everyone, but babesia can be pretty tenacious.
And I agree with the other comments, diet is important as is detoxing. Maybe you are already doing those things, but always good to mention them