User blog comment:RoznosicielCiast/CCC5 - Yngaire, the Queen of Thieves/@comment-1330314-20140910070930

Thoughts:
 * I'm not really a big fan of the Crown. If sold immediately, it gives Yngaire a massive starting gold advantage, which in high-end scenarios could create an irreversible lead in and of itself. Past that, however, it's a you need to permanently disable to make use of. I get that there's supposed to be a choice factor in this (do I sell this now, or do I wait until I get more fed?), but seeing as there's no real guarantee as to how a match will evolve, the level 1 sell seems like the best option.
 * Starting with Mirrorize, as this is Yngaire's defining feature: the core concept is really cool (every ability is double-cast), but the implementation is horribly confusing. The fact that your mirrored abilities go in the opposite direction of your original's means that landing both the original ability and its mirror is only going to happen by chance. The X/Y mark mechanic just adds to the confusion. This would all work a lot better if you could just summon a clone you could swap positions with, and have each version lay a mark with their abilities that the other detonates.
 * Slippery Blade is an awesome ability that both synergizes perfectly with Yngaire's mobility and emphasizes proper positioning. Nothing to really criticize here.
 * As with Mirrorize, Crimson Rift is a bit of a mess right now. You're putting damage on the path of a blink, which has no travel path, and for some reason the thing deals true damage. There's also an autoattack enhancer thrown in, with bizarre Mirrorize interaction. All of this would be a lot simpler if you just had Yngaire blink and emerge with bonus damage on her next basic attack. The temporary dash refresh on kill/assist looks really nice and is thematically appropriate, so that's something you could keep.
 * There's no real reason to separate Double Slice/Deal Finisher into two abilities, besides flavor. It would be a lot simpler if you just had Yngaire slash enemies in front of her then backflip, which would make this a much clearer disengage/execute ability.

Yngaire's kit has a lot of flavor and some really interesting gameplay, but currently also has very confusing mechanics, mainly due to Mirrorize and its X/Y marks. Having Yngaire summon a clone and interact with it would offer a burst of similar functionality in a way that would be clearer for everyone. What your kit mainly needs is a bit of streamlining, as your core abilities mesh well together to produce a highly mobile trickster assassin. I think the Crown also needs a redo, however, as it currently trades in a proper passive for an uncertain amount of gold.