Breeches is an excellent incentive to run cheap pirates like Goblin Tomb Raider and Spyglass Siren
Everyone loves Treasure tokens, of course, so theres going to be some degree of hesitancy to destroy the enchantment in the early turns
Mardu colors give you access to all the top removal cards, and best of all, Edgar's eminence ability makes him useful from the command zone, where he can churn out mini-mes in safety
As Aaron explains, by the time Skullclamp was banned in Standard it was everywhere
Its the easiest because i have a definitive opinion about it, and the hardest because I honestly was so disappointed with the product I got, despite this particular one being the Rise of the Floodborn box I was most excited about
Ninja decks utilize cheap and evasive creatures, and white can provide a lot more options for this strategy