Check the mod priority guide:
https://docs.google.com/spreadsheets/d/1ty239kyJbBs1sLhTo1JvSWuN0mIJsK1nwVdI6OLLtXo/view?rm=minimalAN-94 is a bit of an unfortunate case sadly. She’s not a bad AR by any means, but her upgrade isn’t all that exciting. Unfortunately, her Skill 2 is mostly occupied by AK-12 synergy which can be ignored, while otherwise you find a costly but still good AR.
MOD1 is overall a fairly nice upgrade. She gets more stats and her Skill 1 lasts for an additional second. Not much else to say, straightforward and to the point.
MOD2 gives her
Trailing Wolf Shadows, which carries a lot of synergy with DEFY that, with the release of AK-12 MOD, can finally be used to some effect! It grants all DEFY members a mark every time she switches target or activates Skill 1. The marks stack up to 3 times, lasting for 5 seconds. Each mark gives her an additional 10% damage that can crit. It’s fine on its own, but most notably benefits AK-12 by letting her ramp up debuffs much faster. Ironically, the portion of this skill that benefits AK-12 only is still not that helpful. AK-12’s damage output will benefit from the Crit Rate conversion into Crit Damage, but the conversion of RoF into Damage is not worth it. Overall though, the generic DEFY bonus benefits her much more.
If you’re going to upgrade AN-94, you may as well go the full way to
MOD3. Thankfully, AN-94 does have a nice Special Equipment to go along with the upgrade. That being said, each level of the upgrade does potentially offer something: MOD1 is relatively cheap and offers some nice boosts, while MOD2 does offer a good DPS boost and the synergy with AK-12 MOD.