How much investment bank should be paying to 8 years experienced, basically at mid-senior level?

At goldman it would be above average of IBs. Depending on ur role, 45-70 TC

1.5cr... fixed +variable..

Employer Investment bank ho na ho,

role agar IB ho toh hi paisa jyada hai!

But Goldman generally pays well, better than any other. David Solomon might have made it stingy though in recent years!