I still feel Air India is a good to go transfer partner after merging with Vistara. Although worth 1:0.5, some sectors are cheap, especially the common frequented airports such as Bom, Blr, Maa, Del, Hyd, Pnq etc. Cheapest Airmiles required in Air India are - Blr-Maa : 2000, Bom-Pnq : 2500, Blr-Hyd : 3500, Bom-Bdq : 3500. Lets hope, this list expands after Vistara merger. 👍