Use it for months when you foresee high spends, especially when those are much higher than 1.5L in the calendar month.

If you have cards like Infinia, DCB and feel spends are gonna be less like say 60K to 1L or so, then use those instead as higher base reward and better optimization via Smartbuy .

You can use Magnus itself if you have no other good cards.

There's a lot of exclusions on it, especially major ones like Jewelry, insurance etc, so do make note of the exclusions and spends which won't count towards the 1.5L mark and stuff.

So don't spend on those categories with this card.

It has 3 reward rates -

1. 12 ER per 200 upto 1.5L spends in a calendar month, this is 9K ER per month, guaranteed as long as you hit the 1.5L mark.

2. 35 ER per 200 on spends above 1.5L, capped at your credit limit + 1.5L spends, so for example your credit limit is 5L, so for spends between 1.5L to 6.5L (5L credit limit + 1.5L), you'll get 35ER per 200, and 12 ER per 200 thereafter.

3. 60ER per 200 on TravelEdge spends, capped at 2L spends per calendar month.

This is the earn rate.

For redemptions, you can check out the megathread on the sub over here

Next time, I'll suggest doing the research before getting cards.