You can use WATER monsters to make a beatdown deck by swarming the field and simply relying on their high attack. It's relatively cheap to make since many of them are low rarity or from the card trader. Mako's skill - Mythic Depths is recommended to used in this deck too.
Auto decks are decks that are mainly made to be used with the "Auto-Duel" function. The reason why people often want to go with Auto-Duel is simply because it is done much faster than manual play, since it is fast forwarded and easy to use with just one button. Keep in mind that win rates for auto decks vary depending on what level of Standard Duelists you are going against.
Some decks are made to have a high chance of winning and ends fast. This is good if you ever want to level a character quickly or buy a "Boosted Duel Orb" from the shop. With only an hour of infinite standard duelist spawns, winning the duels quickly can earn you a lot of exp, levelling a character up quite fast.
2. High score for items
The other type of decks are made to get a high score with auto duels. These decks might not have a consistently high win rate compared to the ones made to win, but they can often give up to 3000 or 4000 easily by using auto duel from the start. Earning a lot of points from the Duel Assessment will give more rewards like golds, stones/orbs, and most importantly, the standard gate keys and the colored ones used to farm Legendary Duelists.
How to make an Auto Deck
3 things you should know to build a good auto deck:
1. AI Interaction You will need to get a good understanding of how the game's AI work, which can change from time to time. Press the auto-duel and see how they interact with some of the cards. It's recommended to keep things simple by using cards like Reinforcements, Metalmorph or Riryoku.
3. Check the Duel Assessment page To make an auto deck that gives a lot of points, you will need to understand first what are the things you need to do to get a lot of points. Take a look at the Duel Assessment section. Make an auto deck that can tribute, fusion or ritual to get more points, destroy 5 enemy monsters or be able to summon Meteor B. Dragon to deal over 3,000 damage. Being able to end the duel fast from either turn 1-4 can also earn the quick victory bonus.
AI cannot activate skills manually. That means you will set a skill activated automatically to your auto deck.
Lot of people here complaining on how dumb AI is. If they upgrade AI then the farming will also gets harder that's why its ok if they're dumb you just need to make your Auto duel deck basic so AI can handle it.
"LiKe and SubScriBe for MoRe"
Seriously? The small caps and big caps... turned me off. I was just about to click your link, but when I see this shitty way of writing, I rolled my eyes and will probably not re-roll ever again.
Aliens are a good Auto-Deck.
The AI may get a little..you know...mentally challenged from time to time, but it usually wins because of the strong base it has. It can make big mistakes and not come back but other times it can cope and end up winning in the end.
I run auto-duel 'cause I'm usually at work, so I need a good, non-skill based, "cheap" deck to achieve a high win ratio without paying too much attention to the duel, Alien has been my favorite because it can be used without skills and still work well...in the end, the losing streaks are outweighed by the wins.
I don't have a picture, but you can auto duel fairly well with Destiny Heroes! I only have Aster up to level 21, and have his Structure Deck. Take out the Vision Heroes and keep in 3 Drilldark. Make ALL monsters D-Heroes so the fusion monster can have it's full potential, and it's an easy win against at least the level 27 SD and up to level 40 LD. Vagabond is just luck though.
Just what another comment said, Never Auto Duel coz AI sucks. More than 20 times I do Auto Duel with standard beater and increasing Atk cards and destroyer monster cards. For example when my AI have 1 1900 atk monster and have Super Rush in the hand he activates it even the opp. Monster is set. Then he crush it but on the next turn opp. Activates equip spell to increase Atk and destroy my monster which has lower atk and AI already activated Super Rush and no backrow then I lose. It's awful
I never trust the AI to begin with, I don't know why people love the auto-duel feature.
Dueling by yourself just takes a bit more time, it's not like it's gonna become a 1 hour duel without the AI. And there will be way less stupidity involved since you should know more about your new combo than an AI that requires update from Konami first.