aw make routes for each lvl like overlord said and if another player is in the area (10 tiles arround the place where the bot actually is) the bot returns to fight after this guy until this guy is maybe 30 tiles awaay from his route and maybe u could add some extra jumps for each lvl 'taught by any good player' to use them if the enemie is in any special position...
if the bot has just 3 hearts he searches for an carrot ...

this will work :P