Education: Btech in CSE from Tier-2
Years of Experience: 10 months
Prior Experience: SDE-1 at Amazon
Date of the Offer: June 2020
Company: Microsoft
Title/Level: Software Engineer/L60
Location: India
Salary: INR 1800000
Relocation: INR 0
Signing Bonus: INR 400000 (Over 2 years 2+2, in first month of every year)
Stock bonus: $45000 stock grant vested over 4 years
Bonus: Performance-based bonus up to 20% of salary every year
Total comp (Salary + Stock + Sign Bonus): ~INR 2800000 (Distributed stock over 4 years )
Benefits: All MS Benefits
Other details: Do not have a competing offer.

Current compensation at Amazon-
Base - 14 lakh
Sign on bonus (as got 10 months back ) - 6.5 lakh over 2 years (3.5+ 3; each divided monthly )
Stocks- 10 lakh (6 RSUs ; 5%, 15% , 40%, 40% over 4 years)

I have a good team at Amazon. Not sure about promotion though, as just completed 10 months.

Questions I have:

1. Is the offer good or there is a chance to increase it? If yes, in what areas?
2. Should I wait for promotion at Amazon and decline the offer at MS? I might get promoted in next 8 months or so, hopefully. Also, how is the promotion speed at MS?
3. Should I switch to MS and then work on getting promoted there or stay at Amazon, get promoted and then switch ?
4. Should I use this offer and talk to my manager at Amazon to increase Compensation ?

Thanks for all the help!