As one Reliance rises, another falls – the saga of the bitter rivalry between India’s Ambani brothers and their respective companies has taken on a new twist ever since Reliance Industries (RIL) re-entered the mobile operator space, going head-to-head with its previous stablemate Reliance Communications (RCOM). RIL’s Reliance Jio arm has used aggressive pricing and cost structures to steal market share rapidly from the established MNOs, while RCOM, it now seems, may back away from some wireless businesses altogether. The two companies have cooperated on some levels, notably sharing of sites, fiber and spectrum, and a merger of the two has been rumored at various points. But RCOM has suffered – like the other mobile majors, Bharti Airtel, Vodafone and…