FlyerTalk Forums - Credit card starter pack for India

I'm moving to India for 2 years to set up a new office for my employer in Bangalore, and was wondering if there was a good starter pack for earning points and miles.

I've got an Axis Burgundy NRO account opened, and my RM says the Magnus for Burgundy credit card gives the best mileage rewards. Did the math on the Edge Rewards and it looks like he's right:

12 Edge rewards or 9.6 miles/200 INR regular spend, or roughly 4.3 mpd
35 Edge rewards or 28 miles/200 INR on spends greater than 1.5L per month, or roughly 12.6 mpd
60 Edge rewards or 48 miles/200 INR on Axis Travel Edge portal for flights/hotels, or roughly 21.8 mpd
Rent earning limited to INR 50K spend a month.

I've got a few questions which I hope you guys can help with:
1. If I want to keep it simple and only have a couple of cards, are there any others with a good earning rate that I should look at? My programs are mainly Krisflyer, Aeroplan, Avios, Cathay and Flying Blue. My spend will mostly be on rent, flights, hotels, dining, Uber, Amazon/Flipkart, Swiggy/Blinkit.
2. I don't have a CIBIL score yet, though I have a PAN and Aadhaar card. Axis will give me a card secured with a deposit account, so that's good. How long before I can build up a credit score to apply for a different issuer card?
3. Do I need a RuPay credit card? A friend told me that those are the only ones that earn cashback on UPI transactions, which I suppose I'll have to use.
4. I can see myself flying Indigo domestic a lot on BLR-GOI, so have signed up for Indigo BluChip. Any Indigo credit cards that will make that less painful? I already have Priority Pass and DragonPass so don't care about lounge access.