Goldwardens Gambit has Rebel token and equipment synergy and can become a very efficient finisher if we have some good equipment in play
Kain is a good early play that can guarantee you the top-ups you need, and you can do some dastardly things with him, like building him tall and strapping a Vampiric Link to him to ensure you gain life off of anyone attacking with him
Most of the deck consists of creatures, and you will be flooding the battlefield with great creatures by casting multiple a turn with web-slinging
The extra two cards off the top give you that much more advantage your following turn, hopefully keeping you from two for one-ing yourself and wasting several turns trying to stick an artifact
There are some duplicates, but they are intended to help players gravitate towards the standard format
You can technically build GU as two colors, but there are many incentives to play at least three as you draft the towns archetype