Vampire Lady would benefit from cards that can increase its attack or decrease the attack of your opponent's monster. Most common are Equip Spell Cards, but these cards would be good on most situations.
Metalmorph increases both of monster's stats, which is good for Vampire Lady since it has balanced stats. It would be hard to surpass it even if it's switched to defense position. It can also be used to destroy high level monsters. It will gain half of the attack, of the attack target during damage calculation.
While Mirror Wall is better for defending attacks, since it reduces the attack of the attacking monster by half.
Besides from increasing the attack of a monster, Big Bang Shot gives piercing damage to a monster. Vampire Lady can inflict damage even when your opponent's monster is in defense position. Which is great since Vampire Lady's effect will activate when it inflicts battle damage.
Declares a card type / Sends from your opponent's Deck to your opponent's Graveyard
yeah, this Vampire + Zombie pack is 50% for Yami Bakura.
another 50% is fire based deck that need to combo with Flame of the Tyrant pack
can't wait troll with Yami
though before this, I kept milling my opponent, and he surrendered when I was just about to win the match.. sigh..
It would likely move to slow for that. At best, you catch an opponents monster it atk mode and you can kill it (hard with this card), dealing damage. That mills 2. If they go def after, its only 1.
It may not work for a mill deck, but you can certainly clean a deck of trap/spell cards with it. That would make for an easy win easy.