In the case of Assassins, with the combination with Siege warfare, they are the Brute strength. Just that they target the easiest kill.
The Siege reduce the city defense, then throw themselves against the city, knowing that max 20% of them will die, less if some are strong enough to win some battles, more if you are unlucky. The Assassins then start killing of the weak targets, and the weakened strong targets, till the enemy stack is dead.
You only need one or two strong units to defend the stack. And this strategy is of course best played with Khazad, who got the strongest Siege weaponry, and IMO the best assassins, who also got a bit collateral damage. Using runes, you can use 4 or 5 priests to repair the siege weaponry in one turn. Bambur can also help with this.
This strategy doesn't rely on any metals.
Another strategy is using Summoners or Mages, using either summons (with summoning trait) piled up 2 turns in advance so you have 3 times as many summons as summoners (conjurers, priests or summoners). Here the summons are both the sacrifical support troops, and the brute force. Even tho some brute force could help, like a hero. The mages would instead throw fireballs and meteors, preferably combined with contagion (which works well with the summons as well), which can bombard city defenses down to 0%, cause collateral damage, and eventually kill the defenders.
Contagion can be very important in these sieges as healing of the enemy stack need to be prevented to be able to gain momentum from previous turns of bombardment.
Both these strategies only need "brute" force units as defense, and then only a few. The mages can even use skeletons as units to finish of weakened enemies, since they are undead they won't be diseased either.
The Siege reduce the city defense, then throw themselves against the city, knowing that max 20% of them will die, less if some are strong enough to win some battles, more if you are unlucky. The Assassins then start killing of the weak targets, and the weakened strong targets, till the enemy stack is dead.
You only need one or two strong units to defend the stack. And this strategy is of course best played with Khazad, who got the strongest Siege weaponry, and IMO the best assassins, who also got a bit collateral damage. Using runes, you can use 4 or 5 priests to repair the siege weaponry in one turn. Bambur can also help with this.
This strategy doesn't rely on any metals.
Another strategy is using Summoners or Mages, using either summons (with summoning trait) piled up 2 turns in advance so you have 3 times as many summons as summoners (conjurers, priests or summoners). Here the summons are both the sacrifical support troops, and the brute force. Even tho some brute force could help, like a hero. The mages would instead throw fireballs and meteors, preferably combined with contagion (which works well with the summons as well), which can bombard city defenses down to 0%, cause collateral damage, and eventually kill the defenders.
Contagion can be very important in these sieges as healing of the enemy stack need to be prevented to be able to gain momentum from previous turns of bombardment.
Both these strategies only need "brute" force units as defense, and then only a few. The mages can even use skeletons as units to finish of weakened enemies, since they are undead they won't be diseased either.