As a hail team, i like it but there is a few things that stand out to me.
The first is the mass of weaknesses, 5/6 are weak to Fire, Rock, Fighting and Steel types. this means that an Infernape would cause a mountain of problems. I realise that a scarfed Mamoswine can take care of this problem but if its against a scarfed infernape, the Infernape outspeeds. A Heatran also causes problems here. In my experience, most Heatrans are scarfed, so they will outspeed everything on your team apart from Weavile and Mamoswine. As for the addition of Cloyster, i think this would be a good idea. the Godly physical defence would be a great asse for your team, and (if you wanted to) they can run both Toxic and Normal Spikes, which makes the battle a lot easier. Perhaps it would be an idea to make this more of a stall team, and let hail, spikes, toxic spikes and stealth rock do gradual damage to your opponent.
But as i said earlier, as a hail team, i quite like it, you have many different roles in your team and it can do a lot of damage.
