try reading on forum on how to get Infinia card....
Infiniti might get you closer to getting Infinia as ther NRV requirement is way too high than other account types..
For getting via Imperia, you need have decent long term NRV (around 50L is fine as their min requirement for Imperia is 30L) while holding super/premium CC with high limit (around 8-10L) and maintain good relation with BM and RM so that they can process your application for Infinia, for which you will either have to pay or with get FYF
LTF Infinia was being given during RBI ban but now it's tough