My answer was to a query of how to get multiple visa signature cards for a single person. Since a single person cannot open multiple indusind account at the branch, thats why suggested to open addon joint accounts with other family members.
Say you and your father has different accounts in indusind. You upgraded your account to indusind exclusive. Then you can request the bank to group your father's account with yours, making both exclusive. Both will have separate customer id as is. Just your father will be able to get access to exclusive banking benefits without needing to keep extra MAB.
And yes you can open another addon joint account with your father. That way you can get another visa signature DC + other DCs if you want.
Grouping works Online / offline. Try your RM first, if he delays write to customer support, they will do the grouping on their end.
More about account grouping