Are there weapon requirements for executing?

Solution 1:

The rule is very simple, these combinations provide a chance to Execute:

• Melee + melee
• Ranged + ranged
• Magic + magic

The last 2 basically means you can use a Pistol + Pistol to Execute, but not a Pistol + Wand. You would need a Wand + Wand combination to have a chance on Execute.

So you can use Sword + Axe or Sword + Claw and they will all give you a chance to Execute.

You can easily verify this by opening the Arcane statistics and looking what your Execution Chance is. If you have a combination that has no chance on Execute it will show you that you have a 0% chance to Execute.