R/W Metalcraft Deck

Here's my Metalcraft Deck revised. As I dropped a color, I thought it appropriate to start a new thread for it.

White (14)
Auriok sunchaserx2
Salvage Scoutx2
Sanctum Gargolye
Glint Hawk
Auriok Edgewight

Arrestx2
Whitesun's Passagex2
Soul Parry
Dispense Justice
Seize the initiative

Red (17)
Goblin Gaveleer
Blade-Tribe Beserkersx2
Vulshok Heartstokerx2

Galvanic Blastx3
Arc Trail
Flame Slashx4
Molten Psychex4

Artifacts (11)
Gold Myrx2
Iron Myrx2
Perilous Myrx2

Luxodon Warhammer
Bladed Pinions
Spidersilk Net x2
Accorder's Shield

Lands (20)
Great Furnace x4
Mountain x6
Ancient Den x4
Plains x6

No sideboard as I'm not much of one for them (and tend to forget about it too ...) The Deck only seems a little lopsided for mana. I rarely have had trouble getting the type I need (especially after revising it). Having the 0 cost artifacts usually proves a boon as it is still easy to get them out and they are great for when I want to play the Glinthawk.

Definitely there are some cards that need more than one copy and would improve the deck in their multiplicity.

Considering adding Balefire Lieges as they will make my few creatures stronger and give my spells some extra teeth.

What about, what';s it called, Boros Signet or Garrison. My brother says they would work better.

Garrison, not signet.