Puedes comprobarlo con el comando @mi como señalé en mi anterior respuesta.
El Flee es reducido si te atacan más de dos monstruos al mismo tiempo. Esto significa que por cada monstruo adicional, se reducirá tu Flee en 10%. Esta reducción se calcula antes de recibir los bonos de habilidades que incrementen tu Flee.
Being attacked by more than two monsters decreases your Flee by 10% per every additional monster. This reduction is counted before adding Flee from Skills that directly add Flee (ie. Thief's Improve Dodge). This means that if you are attacked by 4 monsters and your Flee is 150, your Actual Flee would be 120 assuming that you don't have any Flee from any skills directly. This also means that if you're attacked by more than 11 monsters at the same time, they will always hit you regardless of your Flee.
Calculation
Full formula for calculating your Actual Flee is:
Actual Flee = Skill Bonus + [Level + AGI + Item Bonus] * [1 - ((Mobs -2) * 0.1)]
Item Bonus is bonus granted from Items or Cards, Skill Bonus is bonus directly granted from Skills and Mobs is the amount of enemies that are attacking you.
Fuente: iRO classic.