Is My Summer Robin Salvageable?

mine is +hp -spd and barely usable.
Yours is salvageable.

While not the best, having +Spd to allow for more doubles really cancels out that -atk. Just build her normally with fury, spd refine, and iceberg. I would also suggest renewal to get back in deft harpoon range as it would take her to 48 atk.

The thing you always should remember is that if you merge your robin into a better one, you keep your skills, blessings, and everything else except your sp. Build the best robin you can and when summer comes, try and pull a better one if you want and if you get a really good one, just merge into the new one. You can always grind on the training maps to get your sp back. Although, your robin isn't terrible, so you might not want to pull for her on the summer banner so you can save your orbs for something else.