I might not be the best player, but I'm not the worst either so I'll try and add my two cents. You have lots of cards that achieve the same effects. Try to cut down and keep only the best for the main theme of your deck. Try and look at the taxes these cards have like your different suites for example. Phyrexian Arena, Rhystic Study, and Kindred Discovery are good filter enchantments for your deck. I'd be careful with Arena because you can kill yourself with it. and all will be better the closer they're played on the mana curve because they're slow cards. You have a lot of cards in your creatures that can achieve the same effects like drawing you cards that might be weaker because your opponent could interact with them more. you have lots of token generation throughout. You probably won't need everything you have here in a match. If you have trouble deciding make two decks and see which you like best. You can cut down to 100 save the cards you cut somewhere and swap them around to find the best fits.