DLM does have good articles how to play decks and complete missions but gamea has better tier list since dlm uses side deck format which isn't made for duel links there are cards that completely shuts dark/light monster but other types don't have to worry
The reason for side deck format because he lost worlds multiple times and trying to throw a hissy fit at Konami by luring everyone to his tourny. Rather than suck up his multiple losses, he would rather challenge Konami by stealing Konami's customers even though this game is own by them.
DLM has always been bad, they are Konami's lapdog and their tournaments uses side deck which is not in DL, both of those skews what we see on their website, making some decks looks better on their tournaments than they actually are in DL.