Warriors are my second largest army after Orcs and Goblins. There are many vital units / characters for a WOC army, including marauders, warriors, knights and, of course, a warshrine. WOCs are high on points, so you cannot have many pieces. Use a wide range of models, from shaggoths to warhounds to knights. Personally, I would give knights the mark of nurgle to reduce the opponents 'to hit' roll.