Argent Ordnance doesn't work according to description
Argent Ordnance mod description:
[quote] [i]While Charged with Light, dealing damage with a Rocket Launcher to a powerful combatant gives you a major increase to Rocket Launcher damage for a short time, consuming one stack of Charged with Light.[/i][/quote]
However, you don't need to damage a powerful combatant to gain increased damage. Also, it doesn't last a short time, or [i]a short time[/i] is way too short to fire another rocket.