Gen 5 Please help on gen 5 OU team

[sunbhie]

https://replay.pokemonshowdown.com/gen5ou-901309532
I'm trying this team out and it just has no way to ever kill ferrothorn. I even gave blissey focus blast but it doesn't do enough damage. I have problems with that pokemon especially if it rains, fire moves cannot touch it. Thanks for the help.

 

[TPP]

Welcome to Smogon! Please read the rules and provide an importable of your team along with at least 3 lines of descriptions for each Pokemon to explain their roles. Please read the rules carefully and take a look at Team Showcase to see the level of detail we require.