Krauser's fighting knife is really strong and can easily take down enemies with his combo attacks, both light and strong attacks are useful. It is best to use the knife to defeat enemies rather than using his TMP or the bow, but these weapons can be useful in certain situation, especially when you need to keep the combo timer going.

Krauser's mayhem mode gives him the special ability to transform, with very powerful melee attacks, where you can easily defeat stronger enemies.

Time stamps,
Village: 0:04
Castle: 9:38
Island: 19:43
Docks: 30:42