Although currently a fusion based Elemental Hero deck isn’t competitive, the beater variant did become much better recently with the latest changes to certain skills like “Where the Heroes Dwell” , which can now be activated when you have 3000 or lower life points.
The reasons you’d want to run this deck instead of another beater deck, is because of how high your monster’s attack can go with Skyscraper, the fact that you can run R-Righteous Justice which can give you great value and Elemental hero Wildheart which doesn’t care about trap cards.
Where the Heroes Dwell Can be used after you Life Points are 2000 or below. Play the Field Spell "Skyscraper". If there already is Field Spell on your side of the Field, Return it to your hand. This skill can only be used once per duel.
The idea is to play this as just a regular beater deck, but with the added advantage that your Elemental Heroes can become very big with the Skyscraper field spell, and with Elemental Hero Wildheart you don’t need to worry about your opponent’s traps.
These are two very important cards for this deck because they allow you to activate your skill by paying their cost (you only need to lose 1000 life points to be able to activate your skill). Cosmic Cyclone also helps you get rid of your opponent’s backrow making it safer for your Elemental Heroes to attack, and Mirror Wall will help you protect them.
By paying for Mirror Wall and protecting your Elemental Hero from attacks, you will be able to easily get a second Elemental Hero on the field, which has the added advantage of giving your R-Righteous Justice a lot of value.
Arguably the best Elemental Hero to run in a beater version because you don’t need to worry about running into any traps like Wall of Disruption and Mirror Wall, or being affected by Floodgate Trap Hole and Massivemorph.
When attacking a monster with a higher attack while skyscraper is on the field this monster’s attack will rise up to 2500, which is equal to Saffira, Queen of Dragon’s attack and 100 attack higher than Red-Eyes Zombie Dragon.
These are two other great picks for beaters. Elemental Hero Heat has a decent attack of 1800 when alone on the field, which combined with skyscraper makes him stronger than Cyber Angel Dakini. Elemental Hero Ocean is a great way to get back Elemental Heroes from your graveyard so that you can keep the pressure up. His attack is the same as Elemental Hero Wildheart, which isn’t that high and he doesn’t have any built-in protection like Wildheart does. That’s why some people prefer to run only two copies of Elemental Hero Ocean in their deck and replace 1 copy with Elemental Hero Neos Alius because he has a high attack of 1900, which is higher than Gladiator Beast Laquari and matches Gozuki and Zombie skull when Wasteland is on the field.
Just like before, now that Cyber Angels with Saffira has become very popular, Enemy Controller is an important card to run again to counter them. For those that don’t know, in most cases when your opponent activates Cyber Angel Dakini’s effect you want to activate your enemy controller and tribute one of your monsters to take control of theirs and then send that monster to the graveyard with Cyber Angel Dakini’s effect.
Floodgate Trap Hole is a great way to deal with Saffira, Queen of Dragons because it will buy you some time and your opponent won’t be able to activate her effect during the End Phase.
Don’t forget that if you control 2 Elemental heroes, one or more spell/traps and your opponent only has 1 spell/trap; you’ll have to destroy one of your spell:traps as well.
Skyscraper’s effect only activates when an Elemental Hero attacks, so it won’t activate when your opponent attacks your monsters.
Elemental Hero Ocean’s effect can also be useful to send back one of your monsters that was affected by Wall of Disruption/Massivemorph/Floodgate Trap Hole/Mask of the accursed/..
Although your Elemental Hero WIldheart doesn’t care about traps, he can be destroyed by Super Rush Headlong, so the way to counter that would be to chain your own Super Rush headlong to your opponent’s (if you are the one attacking, not the other way around).