How does my fighter with a head wound act when used as a Sentry in a scenario?
This is a tricky one. The rules for Stupidity and Frenzy are spelled out clearly and the Sentry rules are spelled out clearly. He is what happens. After you select the fighter to participate int eh game or they are randomly selected for the game roll to determine if the fighter suffers Stupidity or Frenzy. If the fighter suffers stupidity then you must roll his stupidity roll at the start of each turn and he will also be limited by the sentry rules. If the fighter suffers frenzy then all rules for Frenzy and being a sentry apply. Keep in mind that frenzy is based on closest target and Sentries are usually not aware of targets so just because a raider is within the Frenzied fighter's charge range does not mean that they are aware of him.