Hey man, I didn't want to post this on your RMT because it would be a one-line post so I'm posting it here instead..
Why don't you try Scarf Flygon instead of Landorus ? He can revenge-kill almost all Dragon Dancers and has Fire Punch/Blast for Scizor.. He can ThunderPunch Gyarados, Outrage Dragonite/Salamence, Earthquake Tyranitar etc.
Try it out :D