I already made a post about setting powders; however, most of the products mentioned have been discontinued. So, I decided to make an updated post about the powders that I have been enjoying.
I have an extremely oily t-zone and normal (not dry or oily) skin on the rest of my face. I find that when I don't set my foundation with a powder, my skin gets more oily throughout the day and my makeup tends to move or fade. So, I always set my face with a powder.
Generally, in the winter, I'll pair a luminous powder with a mattifying foundation or a mattifying powder with a dewy foundation to prevent over drying my skin & emphasizing dry spots. In the summer, I'm more likely to pair a mattifying foundation with a mattifying powder to prevent my greasy t-zone from looking like it got attacked by a lump of lard.