How closely aligned are Buddhist ethics and Nietzschean values? I know a little about both, and may even have read a comparative study (some time ago). Was hoping to harmonise them via 'karma': the agent experiences the result. But there seems no linguistic or rational reason which is strong enough to believe in rebirth, so it seems to me that Nietzsche's analysis (only the success of the superman matters) cannot be reconciled with Buddhism. If so, I'll probably side with Buddhist ethics (I think we need art, not individuals, and Buddhism doesn't make only for worthless aesthetics), but it's a blow, because in the process we may have to sacrifice what is - it is sometimes claimed - is the very highest type of well being possible.
This question is just from someone who has read a small bit of Nietzsche studies (I'm not philosopher), but I take claims about morality quite seriously, that's all.