Soulstorm? In any case, just thinking of getting the "More Sluggas" tech while playing as the Orks makes me moist. It basically makes you invincible.
Check out the mod Firestorm over Kronus: http://dawnofwar.filefront.com/file/Firestorm_over_Kronus_Beta_35;104183 Adds a ton more units to the game (pretty much everything from all the respective codexes) and claims to make the game's mechanics closer to 'tabletop rules'. I have it modded onto my game right now and have been enjoying it. -Note, this mod is for the Dark Crusade version of DOW, I don't believe it will work with Soulstorm... If you have Soulstorm you'll want to download Firestorm over Kaurava instead (basically the same mod, updated for Soulstorm): http://www.moddb.com/mods/dawn-of-warhammer-40k-firestorm-over-kronus Have fun!