If you buy three or four heroes in the first week, how will you be able to build up your castle properly?
I play with two heroes, and even then, I have to take all the chests for gold in the early stages, rather than for experience.
And I didn't say that you need to take a Lucky Wizard against a Chaos Elemental. The Chaos Elemental reduces Chaos so much that even with a Lucky Wizard, the damage will be negligible.
I suggest simply taking Chaos to easily defeat neutral creatures.
Well, you won't find Boots of Swiftness under every bush. And the game, as you say, "in the late game" probably implies a large map. If you don't have Logistics, you will fall far behind in development compared to your opponent.
I always take Logistics specifically for the increased movement range. Sometimes I add the ability to traverse terrain without penalty or increased swimming speed to it.