Natasha Romanoff was a young Soviet citizen when her government chose to train her in espionage. During her time in the infamous Red Room Academy, she became the master spy known as the Black Widow.Marvel Source
Early in her career, the Black Widow clashed with Iron Man, but her loyalty to her country waned and eventually she switched sides and joined S.H.I.E.L.D. She later joined the Avengers, and has served with distinction on that team many times.
Red Room Reflexes- maxed this passive for the enhanced dodge for more survivability and more damage.
Escape Roll - for the quick way out of sticky situations. Put 3 in it because of the buff against crowd control effects.
Spin Kick - Right click, for secondary and aoe effect.
Master of Munitions- maxed for maximum spirit per second and spirit per crit hit. You should be criting a lot with this build. You dont necessarily need to have this maxed, i do so i never have to worry about running out of spirit when im rolling across MM.
Painful Precision- for more crit damage.
Superior Intel- defense penetration, also knowing where enemies are is nice so as to get he most kills possible.
Electra Medallion- mainly for dodge and move speed.
Pym Shrinking- mainly for dodge but move speed and spirit regen helps also.
Fearsome Fist - for dodge and the 100% crit when you dodge.
Core with +1 fighting to get that 5% boost to attack speed. +1 to strength for the bonus to physical damage.
For affixes i try for all offense, trying mainly for attack speed and crit damage.
Relic of Atlantis for more crit damage.
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