How critical is it to study combos for each players' range in a given configuration? For example, should I be able to look at a board and ballpark how many nutted combos each player has, how many pairs, draws, air etc?
I think it’s more about the portions of the range that take different actions and how they earn ev.
It’s good to be able to visualize a pokerstove grid and what your opponents range looks like on it. If you can get that part right, combo counting will start to come naturally for many people.