Burn obviously goes well with Stuffy Doll. Just burn the doll and it hurts your opponent. Certain white cards might go well with the doll also.
Pariah/Pariah's Shield: Pariah is a white enchantment that has all damage dealt to you dealt to enchanted creature instead. Pariah's Shield is exactly the same in equipment form. Just attach one to the doll and any attackers your opponent sends over/direct damage gets dealt to the doll instead and hurts the opponent.
Entangler helps with defenses as well. It lets the enchanted creature block any number of creatures. Obviously just have the doll block all their attacking creatures and any non-trample damage gets dealt to them instead.
Guilty Conscience is very nice and creates an infinite damage combo (whenever the doll pings itself it then pings the opponent. This causes the enchantment to then ping the doll again and the process repeats until the game is over)
Also, you might want try to get some cards to protect the doll from being targeted and returned to hand (thus destroying any enchantments) or removed from game itself.
Leonin Abunas is awesome for protecting your artifacts from being targeted by your opponents. The best part is that you can still target it yourself with the enchantments/equipments/burn spells previously mentioned, and he's not exactly a weakling with 5 toughness.
I have a deck with a couple Leonin Abbunas and have found that Mycosynth Lattice works wonderfully with those guys as well. They then give themselves "super shroud" as well as everything else you control.
So it looks like a deck with red for burn spells and white for protection (both for you and the doll) could be pretty nice.