I have dry skin, but in the heat and humidity of summer I do tend to get an oily T zone. I have used both the Kat Von D foundation and Dermablend, to help cover up my redness and acne scarring. Both of these foundations are full coverage, which is what I tend to use during the week for work. A little of the Kat Von D (and Dermablend) goes a very long way. After my skin care routine, I apply a good primer, which helps to prep my skin.I don't dot the KVD on my face like I do with other foundations, as it does dry quickly. I put it on the back of my hand, and with a damp sponge I then apply it and it goes on very easily. I'm sure makeup gurus can get this foundation to work with a brush, but I can't lol. I lightly dust RCMA powder over it and it gives a great matte finish. I don't have an issue with it looking cakey or settling into my scars.
I however take very good care of my skin, I follow the Korean skin care routine, and I don't have any issues with my dry skin, it stays very moisturized, so I can get away with using the KVD foundation without issues.
If you are interested in the KVD, I would go to Sephora and get color matched and get samples first and test it out.