Forum:Cards I should put in my deck or throw away!

I'm here to ask if I should put some of these cards into my decks. I'm still making an Earth deck and a Dark deck. I also use a very powerful Spellcaster deck. Here is a list of monsters I want in my decks, but I'm noy sure if they're good:

Earth deck:

Monsters:Karate Man,

Stronghold Guradian,

Big Shield Gardna,

Mid Shield Gardna,

Giant Ratx2,

Exiled Forcex2,

Poison Mummyx2.