This is a genuine question. I have been playing this game since Old Gods came out, and I conveniently can't remember a time Mage didn't have a top tier deck in Wild. I am also curious what tools exactly enable this class to do so well. Fireball and Ice Block are two cards that you can always find, but I doubt that is exclusive to why it is such a powerful class. In the same breath, when is the last time Hunter had a Tier 1 deck? I don't ever remember seeing this class shine in Wild.
I mean.. Cards don't rotate in wild. If a class has a top tier deck, this deck is going to exist forever, and only get better over time.
All classes have multiple top tier decks in wild. Of course they will not always work against the current meta, but the meta changes a lot in wild, more than people think. Every time there is a new popular deck that is spammed it completely changes the dynamic of the game. APM mage for exemple has enabled and disabled a ton of decks.
I am also curious what tools exactly enable this class to do so well.
It's not really about the individual tools but more how they interact with each other. Ice Block and Sorcerer's Apprentice in particular, enable a near infinite amount of strategies.
Mage has so many different directions they can go, and all those directions are supported by insanely strong cards. This is why you will see more mages/warlock/priest/warriors than hunters, not because individual mage decks are inherently stronger, but because hunter has historically always been restricted to mostly aggressive, board centric strategies, while mage/priest/warlock have explored pretty much everything Hearthstone has to offer over the years. Hunters don't have a ton of card to support slower control or combo archetype, they only have endless variations of aggro and midrange decks. So people get bored more quickly.
I also believe that these 4 classes benefit a lot more from neutral cards than hunter, for the same reason that they have a ton of directions to go in Wild, while hunter will only ever care about tempo and face damage.
I can't fully remember (had a few beers since then), but I believe Kobolds and Catacombs was the expansion that put Secret Mage on the radar due to the additions of Explosive Runes and Aluneth, and they have kept creating new broken Secret support ever since.
Before KaC, in the days of Gadgetzan, Un'goro and Knights of the Frozen Throne, I think Mage didn't have any Tier 1 decks. It wasn't a bad class, it had Quest Exodia and Reno Mage, but they were never more than Tier 2 at best.
Iksar has a hard-on for Secret Mage, he has mentioned personally, so they will continue to receive support.
And Combo Mage decks will exist as long as Mage spells cost no mana.
Like PetiteMouche said, in Wild pretty much every class has a tier I deck.
You could get to legend with a budget face Hunter deck cause going face just works.
I guess this is also in part of Wild just having so many different decks and players, so there isn't a certain deck that gets just completely shut down by the two other decks dominating the meta. Cause there are like 20 different good decks in the meta.
So if we're talking about wild, I suppose every class has a deck able to reach legend since forever, even Mage.
(Also, Tykaine_J, how did you get those golden cards in on your post?)