Hmm. The reason I ask (besides the obvious "What tourney are you taking it to?" which you answered) is that there are certain cards that would make life much easier for you.
For example:
-Crop Rotation, G, Instant. As an additional cost to play Crop Rotation, sacrifice a land. Search your library for a land and put it into play. Then shuffle your library. [Urza's Legacy common] (Tutor up Serra's Sanctum)
-Living Wish (if you used sideboards, to fetch Sanctum as needed)
-Sylvan Library, to abuse with Abundance*. 1G, Enchantment. Oracle wording: At the beginning of your draw step, you may draw two cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.
(For those who don't know how to abuse Sylvan Library/Abundance: With Abundance out, you can get three cards without putting any back. You replace the draws with Abundance. Since Abundance puts cards into your hand as opposed to drawing them, there are no drawn cards to "put back or pay 4 life")
-City of Solitude, 2G, Enchantment. Players may only play spells during their turn. Anti-control card.
From what I do remember of the last time I played against Enchantress decks a lot of them were U/G, running also Verduran Enchantress and Words of Wind*. Some also used white for Academy Rector, Enlightened Tutor, and Sacred Mesa/Auratog as their kill.
Outside of maybe Elvish Harbinger* I'm not sure if there are any newer cards that would help.
*Abundance, 2GG, Enchantment.
-If you would draw a card, you may instead choose land or nonland and reveal cards from the top of your library until you reveal a card of the chosen kind. Put that card into your hand and put all other cards revealed this way on the bottom of your library in any order.
*Words of Wind, 2U, Enchantment.
-1: The next time you would draw a card this turn, each player instead returns a permanent he/she controls to their hand.)
*Elvish Harbinger, 2G, Creature-Elf Druid, 1/2.
-When Elvish Harbinger comes into play, you may search your library for an Elf card, reveal it, shuffle your library, then put it on top of your library.
-Tap: Add one mana of any color to your mana pool.