If you can manage it, the combo of activating Rain Becomes Dust, choosing Damsel/and or Sabbath Breaker to block your RA, and having Brass Serpent in your hand forces them to discard/reveal 8 cards/Lost Souls. I have a deck with that combo, and I've only pulled it off once, but it helped me win the game.
The gold enhancement you were looking for is Pagan Sacrifices. Also, since the best way to use Abom is with High Places, then you could use both PS and Seemingly Insignificant (which is a "place" enhancement).
King Menahem and King Ben-Hadad I can both help get rid of cards in hand, and Menahem can be especially nasty since the card is at random. Also, Emperor Galba (I believe) + Namaan's Chariot and Horses + Heavy Taxes forces your opponent to discard three cards from hand, and if Rome is out (which it should be since Galba searches for it) then you will win 99.9% of battles with that combo.
The Thief is a demon that can discard from hand or Storehouse.
I am Holy forces your opponent to discard from hand if you have a good card that you can recur (Chamber of Angels and Ethiopian Treasurer plus Philosophy are two common methods I have seen).
Also, I would definitely include a couple sites (access sites work fine as well) to put the hand and deck discarder souls in. Then the site remove LS can take the out, and you can put them back in for double the fun.