Hi scrapper
First of all i am not an MTG expert so maybee i am wrong with my opinion.
1. when you campare your mana sources and you mana usage you should use more white mana instead for red and black.
2.Land recomendations: "
New Benalia", "
Sejiri Steppe", "Rogues Passage", maybee if you have more
plains and have long Games "
Emeria the sky Ruin"
3. All of your creatures are expensive cc4 and more. You should have Problems to survive the first rounds. You could use more board wipes, stuff like angle song or some cheap defender creatures. But if your oponent runs another slow deck you shoud be fine.
Just play some games against diffrent types of other Commander Deck. After some Games you will find out what you can improve.
You will see what Cards are use less and are ineffective and which cards you need more.
Please excuse my bad english