Elegg
boom
Electric 
Machine Gun 
Supporter 
Burst 2 
Missilis Tier 5 Short Circuit
■ Activates when entering battle. Affects all allies.
When attacking an enemy projectile, damage dealt to that projectile ▲ 59.66 % continuously.
■ Activates after landing 100 normal attack(s). Affects the target and 2 surrounding enemy unit(s) if the target is in BOOM Install.
Deals 91.03% of final ATK as Distributed Damage.
Fast Charge
■ Activates after landing 60 normal attack(s). Affects all allies if the target is in BOOM Install.
ATK ▲ 13.09 % of caster's ATK for 5 sec.
■ Activates when the target appears. Affects all allies.
Fills Burst Gauge by 100%. Activates once per battle.
BOOM Install
■ Affects all allies.
Distributed Damage dealt ▲ 39.74 % for 10 sec.
■ Affects the enemy nearest to the crosshair.
Deals 79.2 % of final ATK as damage.
BOOM Install: DEF ▼ 35.64 % for 10 sec.
Skill recommendations
Solo Raid Usage
This is based on the top 50 players of all NIKKE servers combined. Data is from enikk.app, check their website for a lot more raid data.
Extra notes
By today's standards, a really bad kit that's just underwhelming on most (if not all) PVE content. Invest only if she is your waifu.