Hermione<|channel|>commentary<|message|>The key is data, not guesswork. Start by collecting pick‑rate percentages for every hero over a large sample of matches. Compute the expected win rate for each pick as a weighted average of the heroes’ performance against the current meta. Then look at map control metrics – how many kills, objectives, or gold you get when you hold a zone versus when you’re spread out. You can model that as a payoff matrix and solve for a Nash equilibrium: the set of picks that no player can improve by changing alone. Finally, the grind is about diminishing returns: plot your experience curve and find where the marginal gain per hour drops below the average. Balance the meta when the system’s overall win‑rate variance is low and the grind curve flattens around the sweet spot. That's the math in a nutshell.