The theme of the Dank Faeries deck is tempo + max annoyance really. Control the speed of play, get out some heavy hitters, use things like stealth and tapping to your advantage.
Strengths
Great faerie and beast synergy, not too stretched on artifacts, magic and aura and really focused on minions and their boosting abilities ie; use your as blockers, making that a little bit harder for your opponent. Throw out and to impact the board state by tapping minions to suit your play.
Weaknesses
High power isn't the focus, and using things like , and can be essential in the late game to ensure your valuable minions aren't just chump blockers.
Strategy
Plan A:
Play only 4 sites, ideally 2 and 2 threshold minimum
Use the to direct burn for 2 each turn from then
Throw minions out each turn, ensuring you pay attention to start and end turn benefits from the likes of , (who you'll need a 5th site for if you play it)
Spread out and control the field - is a really strong card here, early game, maintain stealth and get it to the other side of the board.
Use combinations of cards in the final stages, particular when your opponent is on DD, that can get you the win; , , , ,
Plan B:
If the opponents' deck is more defensive or more magic focused, look to make that a bit more challenging with minions like or and ideal when you can give them movement that comes through the back row.
Protect boosters where possible, like .
Use or to prevent targeting
Always save a magic for the wincon if your minions aren't making as much progress, such as a into or one in hand
and 2 
threshold minimum