Hi, guys, I am confused

When I get 80 Kakashi frag which skill should I breakthrough? Standard Attack +2 or Twin Lighting Shiver +2?. Also, give me a reason why I should breakthrough that skill

Also here is his Breakthrough/Skill Trial

Kamui +1: Causes dmg to the selected unit reducing Nin by 20% and Res by 10% causing Knockdown. The opponent will not revive if killed by this skill. Removing shield and buff

Kamui +2Causes dmg to the selected unit reducing Nin by 40% and Res by 20% and causing Knockdown. The opponent will not revive if killed by this skill. Removes shield and buff

Kamui Y: Causes dmg to the selected unit causing Knockdown Immobile. The opponent will not revive if killed by this skill. Removes shields and buff

Standard +1: Increase Taijutsu and Ninjutsu by 5% with a chance of Low Float (can stack up to 5 layers)

Standard +2: Increase Tai and Nin bu 15% stacking up to 5 layers.

Passive 1+1: Launches 2 standards each round, if the last standard kills an opponent then Kakashi will gain an extra attack.

Passive 2 +1: Kakashi's lineup will have their res increased by 10%. Each time a debuffs hit Kakashi's lineup instead the debuff will be transferred to the opponent's lineup or team.

Passive 2 +2Kakashi's lineup will have their res increased by 30%. Each time a debuffs hit Kakashi's lineup instead the debuff will be transferred to the opponent's lineup or team.

Passive 2 Y: This ninja reflects all debuffs targeted to him

Chase +1: Chases and attack a Low Floated unit, causing Knockdown and Paralysis. Also causing 20% dmg to the surrounding units.

Chase +2: Now causing 50% dmg to da surrounding units.