if you feel you must have it, something really light and very finely milled, like MAC Select Sheer loose powder, is what you need.
I couldn't find an ingredient list online. Do you know what's in Mac's powder?
Slinky, I dislike most commercial powders. Most of them contain cornstarch...perfect food for the bacteria that causes acne. They also contain a lot of chemicals and preservatives. You might try switching to a mineral makeup. Most acne-prone women find their skin improves with MMU.
I've been using BE for a while (now without mineral veil), and I've decided that I want to make a change because it really doesn't hide my pores. I've been just putting on extra moisturizer before I apply the makeup, and that has helped with the oilies...but it is dry and wintery right now.
I have LM oil-free ready to try, and some EM. I see that the LM powder that the site recommends, and I purchased, has a comedogenic ingredient high on the list...so I won't be using that. Mineral veil gives me some breakouts, but not as severe as other powders, so I might go to that out of desperation. ETA: Mineral veil also has another undesirable side effect when used with liquid makeup that I don't like...it is TOO drying!
I haven't been in a usual office atmosphere for a while, so I'm not getting that grease-inducing office air on my skin. I *do* have an oily T-zone filled with blackheads, and I feel like I have to put something on it...especially for professional purposes.