Your finances ought to be mandatory with a super visa application.
If there's one thing I noticed, the Manila VO seems to be more lenient with visiting grandchildren as a reason.
I’ve just read from one of the forums that bank statement is not necessary...some people got approved with just NOA and other proofs excluding bank statement. I think NOA is the most important. I guess it has more to do with the stability of income rather than what’s in the bank statement. But we are not opposed to providing one if it’s really needed.