No dedicated lead set? I know that team preview sort of gets rid of the point of dedicated leads, but Dragonite will probably be the last one on people's minds as a lead, especially if you have something else on your team that could be a lead.
He, throwing in a Bander right in the front lines is so good it's not even funny. You will either get that annoying Politoed dead or if you think Ferrothorn will come, the switch to your Magnezone is a given. Also, most of the "leads" nowadays doesn't even carry Focus Sash, so the OHKO is almost a given.In the analysis it is stated that both the Choice Band and the Mixed Attacker sets make good leads.
I'd remove the Landorus mention since it doesn't get Dual Chop.Steel-types can be particularly bothersome to this set. Excadrill is especially concerning because it is both immune to Thunder Wave and fast enough to hit Dragonite hard with Rock Slide. Other faster Ground-types, namely Landorus and Gliscor, can also pose problems; the former could have Dual Chop to bypass Multiscale somewhat, while the latter can Taunt Dragonite and set up a Swords Dance. Some good teammates to check these threats include Gliscor, Bronzong, and Rotom-W. Rotom-W in particular has a great complementary type combination for Dragonite, having only Grass as a weakness and resisting Ice.