Are there any good BL with poor bottom (or top, I'm not picky) set in ancient times? Best ...

guess you want somethng like Mo Dao Zu Shi. sadly there are not much around,
only few chaps - you will have more luck wiht novels then. but there are other good
historica and/or fantasy ones around:
that one is pretty dark but good. no fantasy but historical
http://www.mangago.me/read-manga/orchids_of_endless_nights/
sooo cute this here, fantasy + ancient times
http://www.mangago.me/read-manga/awairo_emaki/
again more dark but beautyful like a fairy tale
http://www.mangago.me/read-manga/zhen/
also nice read
http://www.mangago.me/read-manga/shounen_to_kusuriuri/
love this, but just bromance
http://www.mangago.me/read-manga/jinjuu_houretsuden/

This seems like your best bet
http://www.mangago.me/read-manga/king_s_maker/

Though I would also recommend this one as it's also historical
http://www.mangago.me/read-manga/barbarities/