Looking at the Ashtkoot Guna milan we see that the Gun milan score is 20.5 which is higher than 18 that is required for marriage. There is 6-8 Bhakoot dosha which is not good as it related to health. You should check if this dosha gets cancelled before marriage as health problems after marriage are indicated.
Before you do any puja it is important to see if the Dosha gets cancelled. 6-8 Bhakoot dosha gives health related issues after marriage for you and your spouse. The person will remain sick and there will be less of marital happiness. It is very important to check if Bhakoot dosha gets cancelled ot Not. If it gets cancelled then you can do the Puja and if it does not get cancelled then marriage is not recommended.
I dont intend to challenge others wisdom but Kumbh Vivah should not be done is there is only i marriage yog in the horoscope of the Girl. If for example the girl has 1 marriage and you do Kumbh Vivah and then cancel it, then technically the marriage is done and second marriage will not be fruitful. There are many other ways to check if the Dosha is cancelled on not.