Vice's mix up is pretty honest, all things considered, so you need to have good fundamentals to open people up. Since this is your first post, I'm wondering have to you checked out the Incomplete guide or the rule of 2 vid? All the same rules apply for vice, and it can take awhile to get used to. tl;dr though, if you are trying to reapproach, keep this chart in mind:

The secret with Vice though is you focus first on punishing them for being in the air, after which your run up gorefest, splash, and the sleeve start working for you. And if you really want to keep pressure going, end combos with sleeve > gorefest instead of mayhem. The hard knockdown it gives is safe jump-able and you can try to open them up with whatever you like. And if you do get pushed out, Vice is strong mid-range too. Most of her normals have about the same reach to them sans jab, so get comfortable with their max ranges, then get used to the range where st.CD, sleeve, A version splash and hyper hop will work. those are essentially the ranges where you are most effective.