Mirror Image is really good if your opponent is giving you trouble early game, or even in team fights late. Throughout the whole game, the deceptiveness of your Mirror Image can save you more then you know!

Sigil of Silence is your money maker, your cannon. This is where your main damage will come from the whole game, paired with Mimic it deals tons of damage, and can take from 50% to 80% of your opponents life depending on items and how late in the game it is.

Distortion is really nice paired with your Sigil if you are looking to do a decent amount of damage while silencing your opponent. On top of that, Distortion is a really nice tool to save for evading ganks, paired with Mimic, it allows you to go a great distance in a very short amount of time, evading death!

Ethereal Chains is nice to keep your target where you want them to be. It's a pretty easy skill shot, and if you are confident you can Distortion + Chains your target, it should profit in a very nice kill for yourself.

Mimic with Sigil works just too well. Really, using your Sigil / Mimic combo is going to do insane amounts of damage. You can use it to harass, or go for a gank, either way you are almost guaranteed a kill if you execute her skills correctly with Sigil / Mimic.