Hmm, I like it, its an interesting team with an interesting strat... heh...
just a couple of notes here
I don't like your umbreon set to be honest, I would suggest charm over toxic and moonlight or rest in the last spot so you can baton pass to smeargle a charmed pokemon then finish th epassig fun to snorlax, or maybe smeargle first and then charming umbreno, something like that
missy- if you hate skarmory you could always try thunder 8)
snorlax - go with double-edge, its garunteed to 2hko skarmory, with belly drum a little recoil won't hurt ya at all!
I like light screen on blissey as well, but boltbeam works just fine here
also, your team gets raped if the opponent has 2 roarers, so tread lightly.