Ahh flanking. I think it was the second pre-constructed deck I bought, and my friends HATED it. Let's see... I'll bullet out some suggestions to keep it brief.

1. Some cards to consider: Knight of the Holy Nimbus, Honor of the Pure, Path to Exile/Swords to Plowshares, Mirran Crusader, Silverblade Paladin, Student of Warfare, and Wilt-Leaf Liege
2. I'd try to keep your avg. CMC a little lower than it is. I'd drop Pentarch Paladin to a 2-of and Knight of Sursi down to 3 or 4.
3. I'm not sure if I like Knight of Meadowgrain in here, drop her in my opinion.
4. I'm not sure how well Emeria, The Sky Ruin will do in here, as you're only running 10 plains. Also with a lower avg. CMC, 4x Windbrisk Heights isn't necessary.

I hope this helps! OH! Door of Destinies is perfect for any tribal deck.

I run 4 Flagstones of Trokair to get my plains needed for emeria. You mentioned a lot of cards with first strike and double strike but I was actually relying on Kinsbaile Cavalier to give them double strike. I agree that I should drop a few pentarchs so I will probably add in 2 Knight of the Holy Nimbus. Why take out Knight of Meadowgrain? it's one of my lower costing creatures that prevents the opponent from attacking. I like being able to use windbrisk as a combat trick. Attack, they declare blockers, and poof play a Cavalry Master to screw with their math or poof play a Knight Exemplar to give them indestructibility.

Ahh a lot of the suggestions I made are irrelevant/useless now. Just in my opinion Knight of the Holy Nimbus > Knight of Meadowgrain, but you'd have to determine that through playtesting. Everything else I agree with :P

didn't think of it that way. i will make the changes.

Oh! I do have an Ooze deck... Forgot about that :P

how does it look now?

Like the changes!