Chaos magic. Is it necessary?

I'm curious if anyone uses Chaos magic when playing as the Elves. I, for example, quite often develop it when playing against many factions (except Mages and the League; I can only defeat the latter on smaller maps).
Hero - Vul... Well, he also has the Training skill.
Skills: I max out Training, Chaos magic, Leadership, Luck, and Defense.
The whole point of using it lies in two skills: Arrow Rain and Enchanted Arrow. I recruit Archers for training. Moreover, I fully develop Lightning magic; there are two benefits here: firstly, the bonus for Druids, and secondly, STUN. And here it's a matter of "luck"; if Chain Lightning appears, the enemy is doomed (in this case, against many factions, you don't need to train more than 2 warriors). Well, if it doesn't appear, then you have to be content with a regular Lightning strike. Moreover, in such battles, you don't need to go to the front lines (especially if there is Chain Lightning); using the stun, you can shoot down enemies with Hunters and Druids for a long time. Ents will take direct part in the battle, and it is necessary to build them as soon as possible.
TRAINING:
Lightning Strike:
Necropolis - Skeletons, Liches, Vampires (you need to catch Vampires with Ents, or it will be very difficult to win)
Inferno - Succubi, Imps, Horrors (first, we kill the dogs, then the Horrors)
Humans - Archers, Archangels (or Inquisitors, since it is quite difficult to train Archangels, and not every game uses them), Knights (you can also try to catch Knights with Ents, but this may lead to a loss)
Fortress - Pikemen, Mages, Berserkers (we kill the Berserker as quickly as possible, then the Bears)

Chain Lightning:
Necropolis - Skeletons, Liches
Inferno - Succubi, Imps
Humans - Archers, Inquisitors
Fortress - Pikemen, Mages

Of course, it is not a fact that the creatures will be exactly like that, so you need to visit the enemy often. The calculation is based on Druids and Hunters, and the stun prevents the main ranged mass of the enemy from moving too often. Dragons and Griffins are not particularly needed.