To streamline and keep things simple on Lost Dominion, Techno Wizard weapons are handled just as we would handle any other weapon. There’s no cost to actually have them and the damage they inflict can be found here https://lostdominion.org/4394/weapons-armor-and-equipment/
We’ve also kept the actual use, charging, etc of the weapons simple and streamlined. To use a TW weapon in a scene, it costs 1 exotic stress for that scene. This applies whether the weapon you pose your character to have is a single weapon or a pair.
Using a pair of weapons becomes a matter of flair or aspects and doesn’t change the mechanics of the attack. You can still only attack once per round and the damage that can be applied is detailed on Weapons, Armor and Equipment page.