AI0 - 0, by virtue of being the tutorial.
AI1 - 1, sometimes the AI gets lucky with it's random cards but otherwise a pushover.
AI2 - 3 - If you don't know what you're doing at this point you'll get beat, but if you've figured out a bit about deck efficiency you won't have too much trouble.
AI3 - 4-5 - Where the 'starter difficulty' of the game begins. Difficulties vary between 4 and 5 based on what deck you face each time.
AI4 / "Half Blood" - 8-9 - The unpredictably will throw most players for a loop if they're not careful. Aside from being the worst to farm, they're the most variable (though this does not mean they are the strongest.)
False God - 7-10 - This
will vary depending on how far you're in the game, and especially based on everything in your deck. Some matchups are laughable at best, while others generally force played to autoquit.
PvP1 - 2-6 - Depends on who you're playing. You'll generally run into a newb (2-4), but if you run into a decent player things can get interesting (5). On the off chance you meet a PvP pro, diffuclity becomes a 6.
PvP2 - 4-7 - I do not play PvP2 often, but like PvP1 it seems to range from the greatly inexperienced to the actually bored pro.
Bronze - 4 on for individual fights. 5 if you're trying to fill all rings.
Silver - 5 all around if you know what you're doing. (and you should at this point.
) If you're not ready/don't have a lot of ups can go to 6.
Gold - 7-8 Feels like a step up from Silver for the most part, like it should. I feel this is where 'starter difficulty' switches to 'expert difficulty'.
Platinum - 10, if the deck in question is serious. No mercy applies when it comes to actual defensive decks here, since this is basically "Build your own False God.". (Farms obviously don't count)
PvP Duels - Depends on the event rules, but a lot more skill is involved and you'll have to go against the same opponents repeatedely, so prediction and deckbuilding to avoid counters is a must. 8-10, depending on the restrictions of the event you get.
