Temple of the Kings now has a glitch! The 2nd effect of it to special summon monster card can't be used. Even if you have a monster in your hand, deck, extra deck, you can't special summon a monster.
Should I farm Lvl 30 instead?
Yami Bakura Lvl 40 is the toughest Legendary Duelist ever. By using the event exlusive skill (Destiny Board of Doom), Ectoplasmer, and Burning Land, he never allows you to stall turns.
If you just aim to earn points:
It depends on your objectvie, but if you just want to earn event points, defeating Yami Bakura Lvl 30 with higher Duel Assessment seems to be reasonable. If you have a deck to achieve 5500 or above score consistently (80％ win rate), farming Lvl 40 is recommended.
Yami Bakura Lvl 30
6000 x7 x2 =42,000 x 2(20 Dice x2) = 84,000
7000 x7 x2 =49,000 x 2(20 Dice x2) = 98,000
Yami Bakura Lvl 40
2000 x18 x1 (40 Dice) =36,000
3000 x18 x1 (40 Dice) =54,000
5000 x18 x1 (40 Dice) =90,000
5500 x18 x1 (40 Dice) =99,000
6000 x18 x1 (40 Dice) =108,000
Des Counterblow (5k - 6k)
We do recommend you to win consistently with 5k-6k score instead of aiming 8k since Yami Bakura Lvl 40 is one of the hardest Legendary Duelist to farm. This is the best deck to farm Yami Bakura consistently so far.
This deck pretty much focuses on higher win rate. If you have 9 or more glossy cards, you will be able to achieve 5k score.
No Union (3k-4k)
Dino beatdown (2k)
This deck focuses more on beating Bakura's monsters with high attack monsters that you can summon easily. This is more aimed towards being able to win somewhat effectively rather than to aim for the highest possible score and delaying the duel to achieve that.
Exile of the Wicked
Balance beatdown (2k)
The goal of this deck is not to get a high score, but to win as quickly and consistently as possible. This deck is formatted to have an 10 monster cards, 5 spell cards, and 5 trap cards. Making use of the Balance skill, this should give you a starting hand of 2 monsters, 1 spell, and 1 trap. Take note that none of the monsters are required. You can replace any monster in this deck with a monster having 1700 or more attack points.
With a guaranteed spell card in your hand, and the fact that all spell cards in this deck are for removing cards from the grave, you should be able to remove Dark Necrofear from the grave in the first turn without any problem.
Always declare fiend when The Hunter with 7 Weapons is summoned, almost all of Bakura's monsters are fiends. The only one who isn't fiend-type is Man-Eater Bug which shouldn't be a problem as long as you have more than one monster on the field.
Keep summoning your monsters to swarm the field. With this you do not have to worry about Man-Eater Bug. Ectoplasmer would also not be problem and might even work to your advantage.
It is able to return Dark Necrofear along with 1 other card in your opponent's graveyard to their deck when destroyed. This will negate the 'Destiny Board' skill, extending the duel. However, do note that there must be at least 2 cards in your opponent's graveyard to activate its effect.
It is able to remove 2 monster cards in your opponent's graveyard from play. This means that the 'Destiny Board' skill will be negated, extending the duel. However, do note that there must be at least 1 monster card in your opponent's graveyard to activate its effect. Though, most likely it will be Dark Necrofear.
It is able to return 2 cards from either player's graveyard to their decks. This will negate the 'Destiny Board' skill. However, do note that there must be at least 2 cards in any player's graveyard to activate its effect.
Among the decks posted here and in the comments, Buster Blader 3SD + Gravity Axe is the one with highest win rate imo. Maybe about 60% for me. Destiny Draw is about 20% win rate for me because my luck sucks and I do not believe in the heart of the cards.
I will telll u the truth. This deck will give u more lose than win. However, if you win, you will get up to 100000 point each to complete the event. This deck can give u more than 9999 damage and card on the brink if you can pull 2 essential cards early. Also, no need to worry about board effect or ecto anymore since win or lose will be determine on your 3rd or 4th turn. Dare to play risky? Try this deck. =)