How much should I ask in Deloitte for a Data Science Manager role (not consulting) ? 12 yoe with a PG.

I'm already at 52.. Do you think it's difficult for me to get a good hike from Deloitte considering their salary ranges ?

They can give , but it all depends on requirement. Ideally the salary ranges vary between 35-55 LPA of a manager , but the exceptions are always there !! Quote your number and see whether they are agreeing or not.