-shudders- Traumatic memories of bad losses to burn decks come flooding back...
Anyways, try Burn cards like Solar Flare Dragon, Stealth Bird - they're monsters that stay on the field as opposed to crappy spells like Ookazi that barely do anything and just lose you card advantage, not to mention the fact that their effects can be used over and over. You could also try stuff like Chain Strike, Princess of Tsurugi, Wave-Motion Cannon or Secret Barrel and Just Deserts, together with Ojama Trio, which can inflict some very decent damage. You'll also need stall cards like Level Limit Area B, Gravity Bind, and maybe Wall of Revealing Light, although this one is risky. Some counter traps to keep these in play wouldn't go astray here either.
Alternatively, you could try a Simochi burn deck where you use the effects of Bad Reaction to Simochi and Nurse Reficule the Fallen coupled with stuff like Upstart Goblin, Soul Taker or Gift Card to inflict damage - again those stall cards could be handy here.