How to raise the Assassin’s influence in cities over 50%

From The Assassins Creed wiki:

The Assassin's Creed is the code and guiding philosophy of the Assassin Order, upheld from the Third Crusade, until modern days. It restricts unnecessary slaughter of innocents, preserves the reputation of oneself and of the Order, and is meant to create peace, not only within the world, but within the individual.

The three main rules (tenets) of the creed are (also from the wiki):

1. Stay your blade from the flesh of an innocent
2. Hide in plain sight
3. Never compromise the Brotherhood

The Maxim is another part of the creed (wiki as well):

Nothing is true; everything is permitted

Unfortunately the ability is incredibly buggy is greatly affected by lag. Just be aware that if you have a terrible connection with the host, you will have a lot of trouble using this ability. A lot of times it's hit-or-miss. But you have the highest chance of success if you use it on flat ground (sloped surfaces messes it up a lot) and you aren't too close your target.

There's one thing I've never realized about until now, the duration of the Mute is incredibly short. Uncrafted, it is 1.5 seconds to be exact. So you really need to be in position and time it right for it to be useful. So no using it too early to create a safe zone, you gotta wait til your target is close enough for you to make your move but not too close where they can overtake you. Also you must use it before they attack/stun/use an ability, it will not cancel it out.

Once I've realized this, I've been able to to make greater use of this ability. No more stunning then dying of poisoning, mute them so they can't poison you and you get your uncontested stun.