I think I have to agree with Eab on this one. For new people, it's a possible option if they really want/need a rainbow. But if you're a player like me that already has a few rainbows and are not in dire need of another, this is a pass. It would be more attractive if a dress/skill bloom were also offered, but I am patient enough to wait for the better deals like we've had in the past to pop up again in the future. But if there is a must have waifu you have your heart set on, then go for it if you feel she's worth the $50.

Lower tp or not, anemone kills pests pretty effectively. I have lots of aoe bosses suicide into her, and her skill is usually a wipe of remaining pests.