not to mention the WH archetype resolves around dominance but has no unit higher than 7, which is terrible design.
True, but with my suggestion that too can change. For example Conqueror. The card stays as it is right now BUT you add:
Devotion: Wild Hunt - Boost self by 4-5 points.
That would help with the dominance problem without making the card an auto include in all monster decks (well, not more than it already is.)
The WH is a bad designed archetype, like many others, the cardpool isn't fully optimized top-down.
The Conquerer ability you describe here is similar to beta Ice Giants but buffing a 4 provision card to 11 points is of course broken.
Buffing the Ice Giants instead would be better and is actually in line with other 6p cards likes NG Viper witcher.
It will definitely will make them playable but frost as a whole is not good right now due to armor dwarves and no unit ST.
Weather effects actually should ignor armor otherwise these cards will rapidly enter the large pool of dead cards when armored units become more prevelant.
Another example why WH sucks as an archetype is the Imlerith and Imlerith Wrath combo.
This combo will cost you a whopping 18 provisions to do a single unit removal.
For just 10 provisions you have Heatwave that does the same with the extra option to remove a scenario without any condition at all!
This already is a terrible trade and on top of that the discard deploy ability on Imlerith makes it even worse.
It's barely better than a 6 provision Ghoul and you'll need to sacrifice provisions on something like a Pugo, Golyat, Yghern or Speartip cards.
Playing such cards from hand from a value point of view is always better than discarding them.
But details aside the whole dominance concept supporting the WH archetype is bad.
WH only have to be centered around frost to activate their stronger deploy ability.
This will also buff the frost leader because using a charge will make your cards better + the frost damage + movement value.
Some kind of row punish card would definitely help as well perhaps Ice trolls could do the trick here.
But having both conditions(dominance & frost) makes this archetype uncompetative at higher ranks/pro rank thus not played.