Fine as is. Rainbows are extremely customizable. If I remember correctly, you had no Arsenics or Vamp Stilettos, which means Hammers are a nice substitute. As it is you're not using any
or
, so I'd recommend either of two options: replace 1 Hammer and 2 Horned Frogs with 2 Poisons and 1 Adrenaline. After that you'd probably want to replace 1 Flayer and 1 Graboid with 1 Lightning and 1 Blessing.
If you want to make a classic Antabow with replaced Arsenics, do -2 Frogs, -2 Flayers, +2 Lightnings, +2 Forest Spirits, -1 Graboid, -1 Hammer, +2 Poisons.
Another option is to pack a Mummy for the
. No room for Poisons that way, of course, and Poisons tend to be better since they come out every time you draw a Nova. That said, Mummy lets you save on one card slot for something else. It's a good idea to try to fit in 2 Lightnings for the instant CC, but it really depends on what opponent you plan to face. Lightnings wreck in PvP1 and Bronze, but are less powerful in Silver and AI4. That's not to say they're not worth it though; they're still strong. Would definitely pack Flayers for AI4 though.