Hey Sairamkumar,
Solid setup honestly - most people running 40 domains are nowhere near this disciplined. A few things worth adding if you haven't already:
Reply rate tracking per inbox not just per campaign - helps you spot which specific inboxes are degrading before placement tests catch it. Sometimes a domain looks fine on placement but the reply rates quietly drop first.
Also worth rotating your sending patterns - same send times every day can become a fingerprint. Mixing up send windows across inboxes adds another layer of protection.
And if you're not already doing it, a quick manual spot check on a few inboxes every week catches things automated monitoring misses - forwarded spam complaints, auto-unsubscribes landing weird, that kind of thing.
If you still need any help, you can always text me!