Magic in Heroes of Might and Magic V.

Isn't it obvious that the simplest and most straightforward way is to develop one of the two magic schools available in the guild? Based on this, spells are chosen, and already on the battlefield, the most effective spells are selected for the current situation, or with an eye toward the future, or based on the position of creatures on the attack/defense scale, etc. There is no universal choice for everyone. While a warlock, mage, or necromancer can easily deal damage with chaos magic, and quite effectively at that, a knight has significant problems with this; only artifacts can help him, and he'll need to equip quite a few of them. Darkness and light are the most versatile magic schools. Mastering spells of levels 1-3 doesn't require much magical skill, but for the effective use of higher-level spells (levels 4-5), it is essential to significantly increase magical power, preferably by developing the school to its maximum level. You need to have a certain base of knowledge, practical experience in using magic, and be able to improvise. Sometimes, unconventional solutions (darkness for a wood elf, light for a demon, etc.) look very good, and this shouldn't be forgotten either