rate my team, suggest changes, looking for a 6th

i dont compete but i want pokemon that can be used in competition just in case i decide to go that way

Forretres - entry hazard setup/cleaner
Blissey - aromatherapy / s toss
Jolteon - sweeper / wish
Bronzong - dual screen / explosion
Aggron - defense soak / MEGA
???

Don't know what to put last but i have a:
spiritomb
snorlax
aegishield