Dragon Link is an exceptional deck that can potentially go through its full combo without using its Normal Summon.
A lot of the deck locks you into Dark monsters from the Extra Deck, so I would recommend making Romulus quickly, as Dragon Ravine is a great card for any Dragon-based deck since it was first printed, or if you need to make a Halqifibrax combo to get started you should to it early in your turn.
Borrelend Dragon is a very strong card that just got printed in the TCG, as it cannot be destroyed by battle or card effect, nor can it be targeted, meaning that the only outs to it are a Kaiju monster or a non-targeting absorption effect, such as Underworld Goddess of the Closed Word, and by negating an Effect Monster, permanently, can simultaneously Special Summon a Rokket from the Graveyard.
Chaos Ruler is a very important card for this deck, and is fortunately a Dragon, as loading up the Graveyard is nothing but an advantage for this deck.
Overall, the deck is very strong, very consistent, and shows that it deserves to be considered a meta deck in this format.