The best defense is offense. What I think you need is to get 21 damage out by turn 6 or 7, maybe even 5. Take a look at some other options: MagicalHacker - Sigarda, Host of Herons.

I should specify that I don't play French. This deck sits down in pods of 4 to 5 people, so burning out early leaves me with no cards in hand and 3 pissed off opponents. Also, the league I play in charges points for knocking out opponents on turn 5 or earlier.

My meta is heavy with wraths, so creature based mana ramp doesn't work and Sigarda is by no means safe after my turn passes. Even land enchantments just get blown out by the odd Disk or O Stone. I run a lot of wraths and card drawing engines like all the enchantresses and Hunter's cards because card advantage is the name of the game here. Endurance is a lot more rewarding and consistent in my league.

I'll be putting in True Conviction , but the big auras like Indrik Umbra and Shape of the Wiitigo aren't quite big enough to ensure a KO on their own and don't offer any utility beyond a big guy. The massive auras like Eldrazi Conscription and Mythic Proportions might work, I'll keep an eye out for a slot.

Saw your forum post, I used to play Sigarda, but left her for a Bant commander due to interest in blue. Here's the problem, and it's two words.

Spot. Removal.

You run only two cards. Oblation and Return to Dust . Which are really good, I'll give you that. But you need more.

My list of W/G spot removal for different permanent types in order of best, to worst.

Beast Within

Swords to Plowshares

Path to Exile

Deglamer /Unravel the Aether

Nature's Claim

I promise you, you find room for the top 3, you'll win more games.

I had Swords and Path in the first draft of the rebuild and swapped them out for Oblivion Ring and Banishing Light because of deck synergy. Normally I hate O Ring effects because they end up sheltering your opponents cards from board wipes, but in this deck they work too well to pass up. As enchantments they're hit by Replenish, Silent Sentinel, Sterling Grove, Academy Rector, and they trigger all the Enchantress effects.

Still, those suggestions are all great cards and I should find room for them. Beast Within in particular, as I'm worried about running into Aura Shards or Act of Authority and only having a handful of answers. Trying to find a slot of Qasali Pridemage too.