I find it frustrating when I dont get the color I want so the cost is worth it since it allows me to enjoy the game. I have played the same deck with basic lands and it just never worked right and I dont use rare's because I am playing for fun and I have no intention of shelling out cash for the gold.
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The point of five color decks is to use the bright and shiny multi color cards, and you do have many of them in this deck. However, when you absolve to go for all five you cant put in cards that cost more than one of any single color (ex counter spell costs 2 blue) because you cant count on having multiples of the same color. As others have suggested this deck needs a lot of work in the land department.
Seeing as its 89 cards atm I assume you are still working on it. Whenever a deck has so many different types of cards in it stability and predictability go out the window. You basically have given up on having any pre-planned combo to win the game and are counting on having so many different things that no one can really build a deck to counter all of the assets you have. It is funny to bring a deck like that to a tourny; it really has a way of pissing off the regular players if you beat them.
You might want to check out what "megrim" does if the point of your deck is to bounce your opponents cards and then make them discard with a follow up spell. All you have to do is get them to discard 10 times in most cases. It is often faster than the traditional milling methods.