It's often a safer bet to just play the removal spells and one or two expensive-to-cast creatures from your splash color
Now, she won't toss on a bunch of +1 counters as easily, but neither of her first two abilities drain her, and her second is a strong one you can learn into
Of course, forcing players to sacrifice their creatures, adding your own sacrifice outlets, and mana generation will help Sephiroth overpower your opponents
Ultimately, while there are numerous awesome Faerie cards to consider building your deck around, the new Fae Dominion preconstructed deck seems like the perfect starting point
Modern Commander design has significantly strengthened white's ramp identity
And thats with rounding up to 5%