Double Damage support has been added to TUS scheme editor. Since the game engine treats Double damage as a weapon, you can modify 4 values of Ammo/Power/Crate/Delay for this utility. However only Ammo and Delay values are used in the game and Power/Crate ones are ignored at the moment.
Settings a value for the Delay works like any other weapon. Double Damage will be activated when that specified turn is reached.
Settings a value for the Ammo, makes the game to use all those ammo at once. Enabling "Conserve instant utilities" in the advanced game options, will allow the game to consume Double Damage by one each turn.
Example: If Double Damage Ammo is set to 3 and delay of 4:
All 3 Double Damages will be used in the 5th turn of the player.
If "Conserve instant utilities" is enabled in the advanced menu, one Double Damage will be used for 5th, 6th and 7th turn of the game.