How to supplement a corporate plan with a room rent cap?

I have a 3-lakh corporate plan (provided by my employer) that covers me and my family (wife and 2-year-old son). Since it is insufficient to meet current medical costs, I wanted to supplement it. One way is to go for a top-up policy of 10-20 lakhs with a deductible of 3 lakhs. However, my base policy (corporate GIS) has a room rent cap of Rs 7500, so I would have to abide by it in case of hospitalization. The top-up will only kick in after 3 lakhs are exhausted. The other option is to go for another family floater policy of Rs 10 lakhs without a room rent cap. It has a higher premium, but I can use it as my main policy since there is no room rent cap. In that case, my corporate policy will almost be redundant. I am a bit confused. Please advise.