Jill Valentine

Electric

Assault Rifle

Attacker

Burst 3

Abnormal

Magnum Ammo

■ Activates at the start of battle and upon reloading to Max Ammunition. Affects self.
Magnum Ammo: Normal Attack Damage Multiplier ▲ 30% for 9 round(s).
■ Activates when using Burst Skill. Affects self.
True Damage ▲ 34.99% for 10 sec.

Acid Ammo

■ Activates at the start of battle and upon reloading to Max Ammunition. Affects self.
Acid Ammo
Function: Upon reloading to Max Ammunition, only the first round deals sustained damage to the target.
Effect: Deals 192% of final ATK as sustained damage every 1 sec for 30 sec.
■ Activates when entering Full Burst. Affects self.
ATK ▲ 40.03% for 10 sec.

Supercop

40 sec Cooldown

■ Affects self.
Fixes reloading speed at 99.96% increase for 10 sec.
Removes 100% of bullets.
Forced Reload
Hit Rate ▲ 80.78% for 10 sec.
Attack Damage ▲ 75% for 10 sec.
Normal attacks deal True Damage for 10 sec.

Defense Reduction

■ Activates when attacking enemies. Affects the target only while it is under attack.
Damage Taken ▲ 15% continuously.

Skill recommendations

Skill 1

Skill 2

Burst

Build

Cube: Since she wants to avoid max ammo capacity, go for Resilience, the usual suspect. Quantum or Assault can work but it's more copium.

OL Gear: Elemental damage, ATK and hit rate take priority. Hit rate is nice when she's not bursting since Assault Rifles tend to miss quite a lot of core shots. Crit lines can be used as fillers for more damage. PLEASE AVOID MAX AMMO CAPACITY.

Pros & Cons

Great plug and play damage dealer for elemental content that has consistent damage output and also buffs other units
She's a modern last bullet unit. Biggest difference with characters like Summer Anis is that she is not bricked if you get max ammo capacity and you suddenly don't have more rocks to reroll
True damage went from a meme to actually having a few units to pick from. Jill is added to this list as one of the strongest with Vesti: Tactical Upgrade

Outside elemental content loses a lot of damage and is not worth using compared to characters like Mihara or Ludmommy as a debuffer
If you get more than 9 max ammo, you have to manually reload to make sure all your attacks get buffed by skill 1 (yes, it's a con, I'm a filthy auto player)
Her sustain damage feels out of place and harder to scale considering she fits way better on true damage teams. This is more nitpicking rather than an actual negative side, since it makes it cheaper to invest in her (skill 2)