Actually I've gone all of this time without Magnezone. Eventually, you learn some tricks of how to neutralise such threats to the passing and save Smeargle for a good opportunity. It's more reliable than it looks. The team currently consists of Granbull/Gallade/Rotom-w/Empoleon/Smeargle/Dragonite.That needs Magnezone support, or you won't be passing anything reliably with Scizor and Skarmory around.
Then again, using Magnezone with Dragonite isn't really a problem.