You should consider more basic lands. If a Blood Moon so happens to stick, you're SoL.

I'll probably end up cutting Breeding Pool for a basic forest.

Perhaps even remove two Thought Scours and add two basic lands. You have a lot of fetch lands to fuel your yard for the one delve card you incorporated.

I agree definately try for 18 lands 16 is crazy ballsy and Thought Scour is definately the cut.

Love the deck though. Vey similar to what i'm currently running except i run 5c for Tasigur, the Golden Fang and Tribal Flames.

You should also take a look at Vapor Snag and Boros Charm the indestructable can be invaluable. Or if money isnt an issue the crazy versatile Dromoka's Command

I only have 2 drops and can trips galore. 16 lands hasn't been a problem yet. I do like 1-2 copies of dromokas command

Fair enough then, if it ain't broke.

Running Cats without Sacred Foundry is hilarious.

I've been thinking of adding it myself but the only problem is that it's a little awkward with lightning helix

When you're running 5-color, you're a little beyond the point of "a little awkward," unless you're running true mana fixers...

this might be a stupid suggestion but...

you could cut delver. it's a strong card but really underwhelming when it doesn't flip. In its place you could run Kolaghan's Command and another snapcaster along with the set of tribal flames.

At 45% instants and sorcery spells it's safe to assume that delver flips about half the time. Its important to play an early threat in tempo and as a 1 drop he's just a cut above the rest.