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If you'd like to have at least a little enhancement support for TSA, consider using Loaves and Fishes. It can be used for the 5/2 numbers in a BTN battle, it can help generate Lost Souls when you don't have access to any on the table (or there aren't any at all), or it can be combined with Gifts to give you even more drawing.
I've never been a fan of First Fruits. If any of your opponents have either Darius Decree or Rain Becomes Dust hiding in their artifact pile, you're going to take a major hit to your offense or deck.
10 heroes is not really enough for a speed deck, but especially a multi deck. I would add one or two more heroes.
Having defense in multi is merely a liability.
I've had 10 heroes in this deck since I first put it together, I can't remember having any issues with that. Any suggestions on who would be a good add, or what to take out for them? I'm already having size issues without adding more into the deck. Possible adds:-Andrew-Michael (AW)-More silver enhs?-Fishing Boat-Birth Foretold-More/different defense?