Saving money for that is totally worth it. It is much better than the Lenovo laptop like CPU is much better & GPU(GTX 1050) is twice as powerful as an MX150. Also, it is futureproof, which the MX150 isn't. DOTA 2 got a graphical upgrade in 2014 if I remember correctly. If it gets another bump in 2019 or 2020, MX150 will definitely struggle. Not to forget the 1080p display which is a treat to use for everything & a M.2 SSD slot. SSDs might be the only upgrade which results in a big noticeable difference right now in computers when switching from a HDD (provided your OS & programs are running from SSD).
In case you don't know, the paytm cashback can be transferred to your bank account for a small fee (at least that was the case when I bought my laptop & transferred 10k back to my account, just read their terms & conditions once again just to be sure).
