I think it's easier to make this cuts when you're not emotionally connected to some of the cards (yes I said emotionally) lol.
I know what you mean. I have the exact same problem with some of my decks.
A couple questions: You don't think that by removing the canopy spiders I will leave myself too exposed to decks with flying? I might leave Prismatic Omen in there since it makes all lands every other basic land type in addition (that means they're all technically Islands as well, no?).
Canopy Spider is one of the cuts I'm less confident about. Maybe you'd be better off removing
Energy Chamber. But the protection it provides really isn't all that great. It's just a 1/3; I think you're probably better off taking a few hits, then ramping into something bigger and scarier. Although I guess it depends on what your friends play; if your local meta has a lot of 2/1s, it's pretty solid.
And yes,
Prismatic Omen synergizes nicely with
Vedalken Shackles. But you only have one
Shackles, and in a two-colour deck it'll often do nothing. Powerful card, but I don't think this is the place for it.
I liked Eater of Days because it gives the potential of having a 9/8 out there by the fourth turn, but I haven't played it enough times to know if losing those two turns is too detrimental. What do you think?
I think it's a trap. It has no protection from being bounced, destroyed, or otherwise turned into a gigantic
liability.
You're better off with fatties that just cost mana, I think.