I hear ya. I live in Phoenix and my skin is perpetually dry (body and hair, too). It's tough +++
For powder blush I like IT Cosmetics French Boutique Blush Brush or anything not too +
No, they're not, but they're also not as easy as powder. ++
A lot depends on your skin type. For me it's Chante FS, MUFE Reboot, Surratt (I have dry skin)