Pure, or extreme in one direction, decks usually work best at the ends of rotations, not the beginnings, because you have more tools that can go extremely in one direction
It’s very unlikely to be able to build such a deck on the onset of a rotation such as now. Aggro as an archetype in its purest sense doesn’t work at the moment for the pretty much the same reason
Now the question becomes, can we go pure midrange or pure control? Will that work?
Well, I’m not the right person to answer those two questions, as I’m not that versed in slower decks (both piloting and deckbuilding-wise)
But in theory, since this is a control meta, managing to build a purely midrange deck should give you an advantage over the others, as midrange counters control
So good luck trying to do that. I recommend building a deck in a way that your average turns to win is between 7 and 9, that’s when midrange decks usually end
According to that, on the Meta in 1k on hsguru, following are the midrange decks based on turns to win beeing between 7-9, from highest to lowest winrates:
- Drunk Pally
- Fryakk Rogue
- Pirate Rogue
- Cycle Rogue
- Protoss Rogue
- Spell dmg Druid
- Ravenous Cliff Dive DH
- Imbue Druid
- Asteroid Shaman
That would be all whose winrates are positive. I must emphasize that this perfectly aligns with my classification of archetypes and complete theory.
Ofc, you also have to be aware of the differences in win conditions/how the decks are played. Although all midrange, some of them are midrange aggro decks, some are midrange tempo decks, and others are midrange combo decks or midrange control decks.