THIS IS A BANNER YEAR for Shubigi Rao. Born in Mumbai but based in Singapore, the artist is representing her adopted country at the Fifty-Ninth Venice Biennale and participating in the Asia Pacific Triennial. Rao is also the curator of the Fifth Kochi-Muziris Biennale, which will open in December after a delay of two years. Yet for someone wielding such clout, Rao has a prickly relationship with authority and the vectors of power and knowledge. She has rarely bowed to the pressures of the art market, bucking convention with back-to-back multiyear projects that defy the churn of the commercial