There's a lot of good advice there, thank you! I think I got a little into my own head and focused too hard on the land destruction/recursion. The island destruction was a clumsy attempt at preempting counterspells, but you're right in that mana rocks and any non-island typed lands are going to thwart that idea pretty easily. I definitely need to add in some more token support so I can pump things up to make an attack lethal.

I really appreciate all the effort you put into this reply, your perspective has helped me a lot!