Combination skin type is a bit trickier. Sometimes your T-zone might be oily while your cheek area feels dry, or if only your T-zone becomes excessively oily by midday. For this, you'll need to pay attention to the difference in the zones of your face and use a variety of products for different skin types on different areas of your face.
When your skin is oily in some areas and dry in others, it can be tricky to find balance. What you need is a highly-tailored routine that absorbs and curbs excess sebum, and also keeps skin from getting dehydrated.