Amorepacific has taken minority share in Australian luxury skin care company Rationale Group. In the deal, Amorepacific has an advisory role and voting rights on the Rationale board of directors.     Rationale skin care brand, which offers personalized skincare regimens determined through skin testing and analysis,  has recorded double-digit growth in its average annual sales over the past five years in Australia. Its Essential Six Collections are an array of sophisticated formulations that de...