I would like to have cycle cards nerfed by increasing their time to become active (like mortar or golem).
This would include skeletons, all spirits and goblins, and maybe even wall breakers. This would make the game a very different experience, because this is the only way to nerf those cards without making them useless.
Additionally I would like to see wizards spawn damage (arrow damage, fire ball radius), I think this would be the best way to buff it since it is very vulnerable to spells, but since it gets instant value at the start, the spell will become weaker counter.
Also nerf miner (crown damage) , archers (revert 50% of last buff) and phoenix
I would even suggest a rework for the phoenix, make egg stronger , but make need more to hatch.
This way it will survive log. For the downside for the rework just nerf the hit speed for a bit.
The cards which needs a buff are ice golem (probably hp, or slow duration).
Also guards ,skeleton barrel , bomber and rascals are not seen very often.
Ram rider should get a small buff as well.
Mega minion is in shadow of phoenix, I would suggest small HP buff.
The mother witch needs a rework because it’s to matchup dependant. I don’t really know how to fix it, but I guess make damage higher, and the curse power weaker (decreased hitspeed or nerf piggies)
And last but not the least, nerf all champions:
Queen -1 or -2% health
Golden knight, fix the dashing at once, and 2-5% HP nerf
same nerf for the Mighty miner
also Skeleton king can get 2-3% HP nerf
The cards like witch elixir golem and healer are weak , but their power comes when being overleveled so don’t touch them
EDIT:
And maybe you should consider nerfing crown damage to fireball, poison and maybe lighting