Those are good cards, but you don't know how hard I've tried to get most of these cards. (I don't buy single cards, just packs) And I'm not a fan of the Archfiends. The Archfiends are just the old cards with different effects.
Why wouldn't I just use Summoned Skull? I agree, the effect is really cool, but I don't think it's worth the 1000 points of payment every turn if Pandemonium isn't on the field.