The Elemental Knights mostly resembles a Anti-Meta style with Fusion aspects, because most of the E-Knights is a anti-version of their Attribute's usual archetype. (Silphan against Lightsworns and Fairies, Rioku against Ice Barrier and Swarming and Carnum against DAD.) Also using Super Polymerization to steal your opponent's Trump monsters and Summoning your own can work really demoralizing to your opponent. You should also add "Knight of Justice" as "Headless Knight" replacement and to stop your opponent from Special Summoning.
The main weakness of the E-Knights is that they are totally relying on "Headless Knight" and "Knight of Justice" to be Fusion Summoned. And this style also assumes that your opponent is using a Meta Deck, if your opponent is using some other kind of strategy. Then the cards become almost useless. Also comes that most of the E-Knight have higher ATK then DEF (except for Silphan), so they can easily be destroyed while they are attacking. And cannot be brought back from the Graveyard , thought to they only can be Fusion Summoned.
|Support Monsters|| |