[3.3.5a] How do I update the database so that bosses always drop 1 of each item in their loot table?

On my private server I want dungeon and raid bosses to always drop one of each blue/epic items in their loot table.

For example, Ingvar the Plunderer in Utgarde Keep would always drop Holistic Patchwork Breeches, Ingvar’s Monolithic Cleaver, and Overlaid Chain Spaulders every time you kill him.

I assume I need to change the creature_loot_template to accomplish this. I’m just not sure what fields I need to change. Thanks.