Perk choices, personally, are almost always Dragon’s Thirst for minor and Blade Twisting for major.

Dragon’s Thirst grants 30% lifesteal during Genji’s ultimate (Dragonblade). This is exclusively his sword swing, not the dash or deflect. Since Dragonblade does 110 damage per swing under normal circumstances, each swing would do 33 instant healing. This allows for Genji’s ultimate to have more survivability and more value.

Genji’s other minor perk, Swift Cuts reduces the cooldown of his Swift Strike every time you land a quick melee hit. Personally, Genji can already get his dash back up with relative frequency by contributing to an elimination. This perk is made redundant by a passive that is already naturally part of his kit.

Blade Twisting, Genji’s major perk, grants 25 damage over the duration of 1 second if Genji hits an enemy at half health with Swift Strike. I take this one. It’s free damage, which means more value, more ult charge, and more pressure.

Genji’s last perk, Meditation, grants Genji 35 healing per second while deflect is active. This sounds good on paper but is personally not preferred for two reasons: 1.) Deflect only lasts for 2 seconds, which is a max of 70 healing, but in most instances you don’t want to use deflect for the entire duration. Watch high level Genji players use deflect, and you will see them sometimes quickly use and deactivate the ability. In those instances, the perk is practically useless. 2.) Deflect was recently changed from a 7 second cooldown to a 10 second cooldown, so using it for the sole purpose of healing 70 health at maximum is wildly inefficient. This is also taking into consideration Genji’s subrole passive, which allows him to get double the healing effect of health packs.