Yeah, Sword and Shield gets a lot of it's damage from element damage, so you should try to use one that has an appropriate element for the monster you are fighting. Like using fire for an Azuros or ice for a Qurupeco. If you don't know what elements a monster is weak to, then you can fight it once (I use a pure raw weapon for that one time) and look at it's armor to see what that is weak to.