Man, between Sunset and Trixie, and with only Magic, Honesty, and Laughter left to hand out, that's a tough choice. Then again, it seems like she was just tossing out the Elements at random anyway, so I guess it'll be fine.
I advocate the Flim Flam Brothers to share the Element of Honesty.
...shouldn't Gilda be Laughter, instead? I mean, the others all got (or are fighting over) the element of the pony that took them down a peg. Fluttershy's only role in the Gilda episode was being adorable.
More like they're getting the element they represent the opposite of. Suri got Generosity because she's selfish, Lightning got Loyalty because she only looks out for #1, and Gilda gets Kindness because she's a bully.