so whats mid or mini tower combinations with best temperature

You mean casing? For me, casing is not the major contributing factor in temperature, or may be I should say casing matters more in air flow than components temperature. Because the components have cooler to manage its' respective temperature, casing has the job to manage the air flow to bring the hot air out. And in different environment, different settings, different user behavior, the same casing will gives different result. So, there is no single solution to all situation.
Personally for me, I will look for casing that behaves good in negative or neutral air flow pressure. Dust is the more of a concern to me than temperature. Also, easy to clean and less gaps that dust will settle in.