The Ku-neigh-ichi’s attack plan is simple: disable guards and any reinforcement, cut communications; scatter the populace with controlled fire, loud explosives, and illusions; capture or incapacitate anyone who didn’t run; gather large sums of valuables, bits, and useful materials; and be gone by morning. So of course a place filled with gemstones and clothing material like Rarity’s Canterlot Boutique would be a prime target.  
I feel like I tried a little too hard to fit too much into the pic, but it’s not too bad. Really though I did do a lot of experimenting with this pic, like the way Sassy is tied up and the magic suppressing tape (which was born from my strange inability to make a good looking horn ring).  
I don’t own these characters just the pic