If you're looking for comprehensive coverage then ILP.
Otherwise if you have no budget or just looking for medical then a standalone.
It's noted within the policy & brochure on the guaranteed renewal.
I won't be able to advise much as I don't know much about your personal finances.
I see, what you're referring to is a hospitalization & surgical benefit as Critical Illness has no "annual limit" but only the amount of payout that you've bought for the plan.
There are a few types of early critical illness plans available for early CI namely.
Early CI - Payout only once for early stage
Multi Early CI - Payout for multiple early stage of CI
If you're looking for a comprehensive coverage for yourself then the proper way to do it is to consult a financial adviser or insurance agent to determine what is the right amount of coverage is suitable for you and what plan are available that can match your budget.