General gameplay tactics and its features.

on the second one - undoubtedly, on the fifth hardly; for example, you'll place archangels, but what will you use to buy them out? Very often the gathered resources don't compensate

It seems you are poorly acquainted with the structure of popular random templates. Do you play on fixed maps or something? You won't believe it, but money is mainly earned in monetary buildings (ranging from crypts to Dragon Utopias). And the more troops you have, the better the chance to uncover a fat monetary object. For example, today on 133 I uncovered a Dragon Utopia with 40 000; with your strategy, that would be unrealistic. Draw your own conclusions.