>Slowbro - NU, but decent for stall up to OU
>Shuckle - NU, but sometimes sees use all the way up to Uber as support
>Registeel - RU, decent stall with sneaky pebbles access
>Arceus - Ubers, and sees >100% usage in AG; the centerpoint of my team
>Volcarona - OU, and a great sweeper that can clean up after Slowbro, Shuckle, and Registeel fuck with the opponent
>Aegislash - Ubers, and ties the stall/sweep theme of my team together
Assigning 1 point to each tier based on distance from PU, we have 1, 1, 2, 5, 4, 5. Mean value is 3, or UU. Median is also 3. Standard deviation is sqrt(3), or about 1.7, so no significant outliers (3-1.7 ~= 1; 3+1.7 ~= 5). I'd say this team would probably do pretty well.