I'm still not sure about the helm soaking threats.
Say you have gimli with his hat and another companion is skirmishing a minion. Another companion lose the skirmish and actions triggering by that taken place (place a wound)... That result in killing the character (and then trheats triggers) and here is the main question: the skirmish have resolved, so we still on the skirmish phase and still be able to perform skirmish special abilities? Or we have to wait until next skirmish starts to use it (since it's not a response action). the rulebook states that when a skirmish ends the free people player have to choose what will be the next skirmish to take place and then it begins...
From rulebook:
• Free Peoples player chooses a skirmish.
• Players perform skirmish actions.
• Resolve that skirmish and assign wounds.
• If any skirmishes are unresolved, repeat this procedure.
I think if the helm or cards like Lorien Protector (13S20), Keep Your Forked Tongue (4U96) and so may others were able to prevent threat wounds they would be tremendous overpowered!
You're right that you can't use the Helm's ability after threats have been triggered; you'd have to discard it as a skirmish action during the skirmish during which (or as the result of which) someone dies. It can work as a threat-soaker because, at the time threat wounds are triggered, the skirmish phase is not over (although you have moved past the part where you can perform skirmish actions). Here's how the timing would work for successful use of the Helm to soak up threat wounds:
1. During a skirmish, discard
Gimli's Helm to prevent all wounds to him for the remainder of that skirmish.
2. Either as a result of taking a wound during the skirmish (
Red Wrath,
Whirling Strike, etc.) or losing the skirmish (no spare vitality, or overwhelmed), another companion or ally dies.
3. Threat wounds are triggered; as this is still the same skirmish phase, the effect from discarding
Gimli's Helm is still active, so all wounds to him are prevented. As mentioned in the rulebook entry I cited above, this means that you can assign all of the threat wounds to Gimli and have them essentially do nothing.