Do "when you strike" effects trigger on any attack, and can Strike cards combine with weapon lines?

Question

Accepted Answer

They trigger only when a card with the Strike keyword is used. Prepared Strike cards can be discarded during an attack and combined with weapon lines, each line still once per attack.

The Lord of the Rings: Journeys in Middle-earth

Do "when you strike" effects trigger on any attack, and can Strike cards combine with weapon lines?

The Lord of the Rings: Journeys in Middle-earth

Do "when you strike" effects trigger on any attack, and can Strike cards combine with weapon lines?