i really dont know what to tell you to replace. For end game kor spiritdancer definitively does it. you may consider dropping some enchants for the great cheap ones. Keen sense is really good, imo, to enchantress's presence.
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you may consider Umbra Enchants, because they have to totemic armor. Also Unflinching courage is great (its armadillo cloak reprinted basically) Also Hexproof Creatures are great, Gladecover Elf, Slippery Boogle are great hexproof one drops, and Kor Spiritdancer becomes a MONSTER with enchants.
Anyway to make this standard ? I sana make a standard budget deck and I like this.