Having multiple copies of "Marie the Fallen One" in your Graveyard and "Fire Princess" on the field will rapidly increase the damage dealt; each copy of "Marie" will recharge your Life Points separately, with each one activating this card's effect. With 3 "Maries" in the Graveyard and 3 copies of this card on the field, you'll wind up doing 4500 damage to your opponent each Standby Phase, enough to defeat them in 2 turns.
Use "Messenger of Peace" while you have a card that replenishes LP so virtually no monster will be able to attack it, while still damaging your opponent. However, it may be still vulnerable against monsters with less than 1500 ATK and more than 1500 DEF that uses DEF in its damage calculation when they attack, and also card effects.
This card may be used in a Burn Deck together with Solar Flare Dragon. You just need to get "Fire Princess" and "Solar Flare Dragon" so that you might inflict damage with both every turn, and "Solar Flare Dragon" shall not be attacked.
Combine with "Magical Android" so that you will gain Life Points every End Phase, while inflicting damage to your opponent. You can also use "DNA Surgery" to change all monsters to Psychic-type for a greater increase.
Use this card in combination with "Life Absorbing Machine" and "Chain Energy"; you will deal damage to your opponent during each of your end phases and you will cause them to pay massive amounts of their own life points with "Chain Energy".
Use this card with "Rainbow Life" and "Skull Invitation" to deal 500 damage every time a card(s) you own is sent to the graveyard for a turn.
"Number 49: Fortune Tune" works great with this card. It can work as a hard-to-break defense, grants you 500 Life Points during each of your Standby Phases to trigger this card's effect, and returns itself to the Extra Deck (and the monsters needed to summon it to your Main Deck) when it goes to the Graveyard so that you can bring it out again.
Combo this card with "Goblin Thief" to inflict 1000 points to your opponent.
Use "Spell Absorption" to inflict 1500 points of damage and gain 1000 Life Points.
Combo this card with "Savage Colosseum," that way every time one of your monsters attacks, you will gain Life Points, which in turn will cause this card's effect to activate.
Yet another OTK utilizes "Spring of Rebirth", "Ultimate Offering" and "Honest". By repeatedly Normal Summoning Honest and returning it to your hand, you gain and pay the same 500 Life Points again and again while doing 500 damage each time.