Hi
@Minali,
Welcome to the forum! Generally NOA is considered to be the safest bet and should reflect an amount above LICO, including the number of people in the family + number of people you would like to apply for.
Just to make sure, you have one POA already, but that doesn't show enough income correct? Also are you the only working member or do you have a spouse/common law partner who earns too? (Perhaps that person can sign as a co-signer?)
You can apply using the employer's letter and pay stub + previous years NOA, but if I were you I would make sure I write a compelling letter explaining why the NOA reflects a low income last year and how now you meet the minimum criteria benchmarked by LICO. Also probably include a reason as to why you wouldn't want to wait an entire year to get a new NOA before applying.
The letter should properly address the above scenario, but once you have this letter in your application your chances of getting a super visa are as good as others.
Hope this helps?