My daily regimen following the last pass shaving is to rinse my face and head (I shave my head) with cold water and then slap on the witch hazel. I then dry off the sink rinse the brush etc etc. After that I pat my face and head dry and apply whatever AS I fancy
I always use both. Regardless of what aftershave I plan on using on a given day, I always apply Thayer's Astringent Witch Hazel with Aloe after I do a pass with the alum block. I rinse the alum off with cold water, and then use the Thayer's. After I use the Thayer's, I let it dry and then I use an aftershave splash, or sometimes a balm. I like the Thayer's because it has the witch hazel and the aloe gives me a bit of moisturizing, which often the AS splashes don't. It may be a bit of overkill, but I just find it's what works for me, and my face doesn't feel good if I don't use the Thayer's first. The Thayer's doesen't really have any scent so I use the aftershave for scent mostly.