How much percentage hike should I ask for role change/promotion?

Principal Engineer with 13yoe. I have been assured of a promotion in July by my manager to Technologist position. That is, if they don't stop hikes and promotions for the whole company.

Current TC: 40L fixed + 10L bonus + stocks

Domain: Computer Vision + ML

I feel like my current TC is average to lower average for a product based MNC. And it will be at least 5 years for the next promotion, if i stick to the same company. Will appreciate inputs from folks who have been in a similar situation. Thanks!