Knowledge or strength?

In my opinion, on large maps, there is a limit beyond which it becomes pointless to invest in knowledge skills: once you find a source of rapid mana regeneration (by collecting a mage's well, capturing a Dungeon with a mana vortex, etc.) or reach an expert level of intelligence and find a suitable helmet, further investment in knowledge skills becomes unnecessary. Also, I only take knowledge skills at the beginning of the game if there is a clear shortage – this usually affects Knights and Rangers. And there are a few other specific cases, but otherwise, strength is the key.