For starters I would never buy that B&H Lee kit - there's a lot of redundancy and stuff you'll never use.
Beyond that, the Lee holders are fine for most things, but depending on what focal length you're working with you may need a wider kit. Are you looking to use a polarizer at the same time as the ND filters? You say 95mm, is it the 35-90, 50-110 or the 24/28/35mm lenses? Are you shooting anything other than the Hasselblad?
What effects are you looking to accomplish in camera? Generally speaking, a 3-stop hard, 3-stop soft, 6 & 10 stop solid are all most people need. Maybe a reverse grad if you're a sunrise/sunset shooter with a clean horizon.
-Joe