Which B!Lyn should I merge up?

So, I have the neutral B!Lyn from the last CYL event and now I pulled a
-Res/+Atk one

I'm running Brave Bow+, so +Atk is awesome, but at the same time, -Res is awful, because she loses 4 points to it and actually needs to be able to take some damage from mages from time to time.... I'm stuck here and have no clue, if it's really smarter to merge into the new B!Lyn

Damn, I wrote +Spd in the first place, but it's +Atk