In all of the hail teams I've used, 90% of the time I just lead Snover... I can understand where you may feel hindered if you're (for some reason) not using Rotom-F or Glaceon as your Choice Scarf user, but come on. The reason you use hail in the first place is to, well, take advantage of the fact that you have hail on the field. The two types of hail teams are offensive and defensive. In almost all the defensive hail teams, they at least recover the HP they lost from hail. In offensive hail, there better be a reason you're using hail, and each Pokemon should aid in that goal. Let's not even forget the fact that most of Snover's limited use is used with its Focus Sash. Being able to fire off at least one Blizzard can seriously hurt an opposing counter; then one of your other sweepers can break through. If you don't utilize the Focus Sash, you're basically just using it for fodder (I'm assuming the opponent isn't stupid and gets Stealth Rocks up relatively early).