Increasing difficulty in casual content ≠ Savage

[Shihen]

Why should 4 player content be the hardest? Cite specific reasons/examples/insight please.

Mechanic failure rates typically scale with player count because each player adds a potential point of failure. They can still make content that is extremely difficult to handle for large groups (e.g. ultimate), but the clear rates will be low and finding a group for it difficult because the target audience is a minority. It's not a terrible idea, but it won't have many players participating in it.

As player count scales down, the content difficulty can increase and still maintain the expected clear rate, while increasing player participation because it's easier to find a group. Theoretically, the most difficult content could be made for solo players but with the limited toolkit a single player has, there wouldn't be a lot for the designers to work with. The smallest party size seems like the sweet spot.