Halloween Sakura - which one??

Hello everyone!
My efforts to get female Grima resulted in... 5 Nekomata Sakuras (and one Brave Lyn). Honestly, I think I broke the game.
Anyway, I've finally decided to do something with the kitty girl. I want to merge the copies, but idk which one should I leave as my Primary Sakura, since I discovered none of the them is -Def. The copies present as follows:
1. -Res/+Atk
2. -HP/+Res
3. -HP/+Spd
4. -Atk/+Res
5. Neutral
I think the most reasonable thing to do here is either to use neutral stats or -HP/+Spd Sakura? I can't make my mind though. OTL
As things like this barely happen (still can't decide if I got lucky or not), I want her to be as strong as possible. Please help me ;o;