I just thought this team seemed good, and I was also hoping to take in a few suggestions for improvement.
Leads:
Escavalier 252 HP/ 252 Atk/ 6 Def
@Steelium Z (Shell Armour)
+Atk -Spe
- Iron Head
- X-Scissor
- Fell Stinger
- Rain Dance
Slowbro 252 HP/ 252 SpD/ 6 Def
@Slowbronite (Shell Armour)
+SpA -Spe
- Trick Room
- Ice Beam
- Water Pulse
- Shadow Ball
Subs:
Cofagrigus 252 HP/ 128 Def/ 128 SpD
@Chesto Berry (Mummy)
+SpD -Spe
- Trick Room
- Will-o-Wisp
- Hex
- Rest
Shuckle 252 HP/ 128 Def/ 128 SpD
@Leftovers (Contrary)
+Def -Spe
- Sand Tomb
- Shell Smash
- Infestation
- Power Split