Check the mod priority guide:
https://docs.google.com/spreadsheets/d/1ty239kyJbBs1sLhTo1JvSWuN0mIJsK1nwVdI6OLLtXo/view?rm=minimalAs the first non-construction doll to receive an upgrade, KSVK originally stood out. KSVK MOD does pack a lot of fun, but most importantly of all: floofier ears than ever.
KSVK MOD’s main selling point is her Skill 2,
Shockwave Demolition Round. When there’s any enemy under the effect of a negative status effect, she will prioritise the closest enemy with a negative effect and her shots will deal a small amount of damage in a cone behind the target. She’ll also see a stat improvement primarily to Damage and Accuracy, increased modifiers on Skill 1, and an interesting new set of tiles that affects SGs.
Sounds good in theory, but the main downside is that she simply doesn’t do enough AoE damage, especially compared to other dolls in the same niche like Hanyang MOD. On the other hand, if you want a frontline-targeting RF, General Liu is more accessible, stronger, and more flexible.Her other downside is her fairly rigid team requirements. She needs someone that can provide consistent debuffs, such as M950A MOD, HP-35, or the Beach Fairy. Without this, her performance drops off even harder.
All considered, she’s still a fun upgrade for commanders that want something interesting. Do note though that you’ll need a well-developed arsenal of dolls first for her to shine, so she’s not recommended for newer commanders.
MOD2 is her ideal stopping point: her SPEQ from MOD3 is good, but it is basically Sniper Ammo and AP Ammo rolled into one, so you can live without. If you happen to be low on Sniper Ammo or just really love KSVK and her new art, MOD3 is not a terrible option.