Well....15 plains is less than 1/3 of your deck. Unless you plan to play with the wod "mana screw" over your head whenever you play this game, consider jacking the numbers back up to 22 (minimum due to equipment).
Aside from that, let's take a look at your cards and sort out the curve:
Creatures
4 x Standard Bearer (2 for a flagbearer)
2 x Silver Knight (2 for 2/2 FS, pro red)
1 x White Knight (2 fr 2/2 FS, pro black)
2 x White Shield Crusader (2 for 2/1 half fly, pump useless)
2 x Veteran Cavalier (2 for 2/2 vigil)
1 x Capashen Knight (2 for 1/1)
1 x Skyhunter Cub (3 for 2/2, can be 3/3 fly)
4 x Skyhunter Prowler (3 for 1/3 Vigil, fly)
2 x Skyhunter Skirmisher (3 for 1/1 DS, fly)
2 x Benalish Lancer (3 for 2/2, kicker unpayable)
1 x Capashen Templar (3 for 2/2)
1 x Skyhunter Patrol (4 for 2/3 FS, fly)
1 x Paladin Of Prahv (6 for a 3/4, foresight for 2 etc.)
Total: 24
Instants/Sorceries
2 x Aura Blast (2)
2 x Divine Light (1)
Total: 4
Enchantments
2 x Serra's Blessing (2)
Total: 2
Artifacts
2 x Bonesplitter (1 and 1)
2 x O-Naginata (1 and 2)
2 x Shuko (1 and 0)
2 x Blinding Powder (1 and 2)
1 x Scythe Of The Wretched (2 and 4)
2 x Vulshok Gauntlets (2 and 3)
2 x Manriki-Gusari (2 and 1)
2 x No-Dachi (2 and 3)
2 x Vulshok Battlegear (3 and 3)
2 x Soratami Cloud Chariot (5, 2 and 2)
2 x Slagwurm Armor (doesn't matter, it's crap anyway)
Total: 21
Now the curve by itself doesn't look bad, and equipment is good at keeping your creatures at a threatening levels, but the problem here is that you absolutely lack the ability to play with half the cards to their full potential.
In a "higher level" deck, the efficiency of a card must be counted, as well the 60 card rule applies. This means we are essentially cutting down 10 cards (7 for the plains and 3 for the extra 3 cards.) So what to take out?
The top there shows that I've been sorting things out by mana cost. And for all that I care, the bottom card of each mana cost is the worst of the bunch at that mana cost. First of all, having so many equipment is useless when you don't have the mana to support it all. Therefore, the best thing to do first is to rid yourself of some equipment.
The 2 slagwoods are gone because they suck (battlegears are better if you really want the toughness boost. But why do that when most of your guys have EVASION and/or FIRST STRIKE?). So we're down to 8. Both Chariots are gone because a good number of your guys already HAVE evasion. Therefore, it's redundant. Down to 6.
I find blinding powder to be pretty useless in general (if you have a FSing 7/1, I don't particularly care about nonexistent damage coming its way). So those are also cut. 4 remaining.
*looks up aura blast and divine light*
Well there's your 4 right there. Divine light is useless again because blinding powder is useless. Aura blast is strictly worse than a disenchant anyway, EVEN as a cantrip. If you want enchantment removal, disenchant is ALWAYS the better choice. That kinda helped out my decisions there. The deck seems to have a bit more focus now, I think.
Lands
22 Plains
Creatures
4 x Standard Bearer (2 for a flagbearer)
2 x Silver Knight (2 for 2/2 FS, pro red)
1 x White Knight (2 fr 2/2 FS, pro black)
2 x White Shield Crusader (2 for 2/1 half fly, pump useless)
2 x Veteran Cavalier (2 for 2/2 vigil)
1 x Capashen Knight (2 for 1/1)
1 x Skyhunter Cub (3 for 2/2, can be 3/3 fly)
4 x Skyhunter Prowler (3 for 1/3 Vigil, fly)
2 x Skyhunter Skirmisher (3 for 1/1 DS, fly)
2 x Benalish Lancer (3 for 2/2, kicker unpayable)
1 x Capashen Templar (3 for 2/2)
1 x Skyhunter Patrol (4 for 2/3 FS, fly)
1 x Paladin Of Prahv (6 for a 3/4, foresight for 2 etc.)
Total: 24
Instants/Sorceries
Total: 0
Enchantments
2 x Serra's Blessing (2)
Total: 2
Artifacts
2 x Bonesplitter (1 and 1)
2 x O-Naginata (1 and 2)
2 x Shuko (1 and 0)
1 x Scythe Of The Wretched (2 and 4)
2 x Vulshok Gauntlets (2 and 3)
2 x Manriki-Gusari (2 and 1)
2 x No-Dachi (2 and 3)
2 x Vulshok Battlegear (3 and 3)
Total: 15
Usually you try to keep the mana costs of what you have near each other, and try to grab more cards from the top of the mana cost list (e.g. white knights/silver knights over say the Capashen Knight) and cutting the bottom guys to fit them in. If you want things such as disenchant in there, you'll have to take slots from equipment or take out the two blessings (though doing so makes the gauntlets significantly weaker) to make room for those, as you do need quite a few creatures.
Since this is an equipment deck, You should still consider Leonin Den-Guards (because they pwn with bonesplitters). So really the rest is up to you, since I have no idea what you have and what you don't have. But I do recommend staying at around this curve OR slightly below it (i.e. taking some 3-mana guys out for 2-mana guys of the same power/toughness).
