Код:
<trigger id="18010" level="1" type="ON_EXIT_EFFECT" chance="50"/>
<trigger id="18011" level="1" type="ON_EXIT_EFFECT" chance="50"/>
<trigger id="18012" level="1" type="ON_EXIT_EFFECT" chance="40"/>
<trigger id="18013" level="1" type="ON_EXIT_EFFECT" chance="40"/>
<trigger id="18014" level="1" type="ON_EXIT_EFFECT" chance="30"/>
Вот так нормально работает. % из носа.