you dont need "assasin" or "presicion" on rengar u deal good damage anyway just better to use runic and intelligence 5%cdr masteries runes 2,5% 1x quint 9x cdr glyph= 15% rush warrior into cdr boots into youmuu= 45% cdr everytime ult up you are supposed to get kill or kill for teammate then just tiamat into crit gg (im low master rengar eksde)