Brave Veronica: +Spd/-Def or +Atk/-Res?

Well, her defenses doesn’t really matter because of wrazzle dazzle, but a +atk might be better since she gets extra healing power

+Atk helps out her combat potential more (assuming she's getting a speed buff from somewhere, or Hone Cavs).

+spd anytime, +atk gives you at most 2 more hp when you heal, but you avoid more double with 39 speed and have better chance at doubling for much more damage. With her spread, she'll live a lot of 1 hit, so she really want to avoid getting doubled

I would definitely see what Lu Bu does before you decide.

My instinct is to take +spd. Doubles = much more damage and more likely to survive initiation from an enemy if they don't have a forced double or a brave weapon

Also, her def is higher than her res by 2 points so her ability to take one hit is maximized if you use -def rather than -res