While on the subject of Trick Room Shandera, I also run one on my Trick team. It may not be the best set for it, but I find incredibly effective:
Shandera @ Leftovers
Ability: Shadow Tag
Nature: Quiet (+Sp. Atk, - Spe)
IVs: 0 Spe
EVs: 252 HP, 252 Sp. Atk, 4 Def
~Trick Room
~Calm Mind
~...