if i'm using a hero like cd, hag, or valk, i only concentrate on denying/harassing and try to last hit all the creeps with my nuke while hitting him also.
it stacks up and you can kick him out of exp range very quickly if done properly, especially with a bottle.
all the other heroes mentioned are also awesome at shutting down bh. the only time i have trouble is when the guy rushes chalice and silences me at every cooldown.