While they are decent at support with the Inner Sight skill that reduces enemies’ defense, their own defense is quite low, and they cannot do a whole lot of damage with their bows. Rogue Scouts are ranged mercenaries, and are generally considered to be the worst you can hire.

You can recruit Iron Wolves by talking with Asheara at Kurast Docks. Iron Wolves can use two different spells depending on their type: Lightning Iron Wolves can use Charged and Lightning Bolt Fire Iron Wolves can use Inferno and Fireball Cold Iron Wolves can use Glacial Spike and Ice Blast. Iron Wolves are the only mercenaries capable of using magic, and work great at supporting frontline classes from afar. To recruit Desert Mercenaries, talk with Greiz at Lut Gholein. The available auras also change depending on the difficulty level. These melee-focused warriors fight with Javelins and Spears and come with different aura options that dictate their abilities. The Desert Mercenaries are the most versatile of all the mercenaries that you can hire in Diablo II Resurrected, and they are generally considered to be the best.

Diablo 2 mercenary guide