Unblockable defenders (Casual)

I started playing magic a couple month ago and this is my first deck.
I didn't have the money to buy better lands so i think it would be on of the ways to make this deck better.

Early:
you want to get saruli caretaker out so you can tap your creature for the mana you need.
Wall of runes has 4 toughness for 1 mana so it will easily defend against creatures till turn 3 or 4 and survives 2 or 3 damage spells, we get to scry as well.
Flame slash can kill pretty much everything for the first few turns and is great against aggro.

After the first couple turns hover barrier starts to come in and you become scary since you have a 0/6 flying creature that can potentially hit for 6 as soon as one of our dragons or enchantments comes out.
carven caryatid is a solid card but mostly there for the card draw and to be sacrificed since it has 2 attack and doesn't work with tetsuko.
I added a couple Huatli last week just for defence and survivability purposes.
Then the way to win the game is to have a around 3 defenders up, we don't need more.
Drop the dragon or the enchantments on a turn and if you can tetsuko umezawa as well then most of the defenders become unblockable and can hit hard.

Another way to win the game is to have a vent sentinel out and damage your opponent ever turn while keeping your defences up to trigger a reaction from the opponent.
Dive down can make a small difference but i didn't use it that much so i took out a couple copies for solar blaze.
Solar blaze is a great addition to the deck and pretty much kills everything that would go through your defences.
Finally Tower defence is in my opinion the best card in this deck as for 2 mana and instant speed you give your creatures virtually 5 power and toughness, it can either turn an opponents attack against him or with just 2 hover barriers you hit with 22 flying for example if tetsuko doesn't come out.

Anyway i hope you enjoy this deck as have i and i welcome any feedback.