[Fandango]

Of course it's fine to use Evil Shoal and other damaging spirit abilities too, experiment with the Cloud of Poison a bit. It actually does rather good damage to a group of enemies for longer period, at least at the lower levels.

It's always hard to say how you should fight against enemies in general, cause you have to use different tactics to different shooters. For example: If the shooters are low level shooters and you have higher level creatures, use Wolves or Werewolfs. They have the Fear ability, which makes 1-2 level creatures unable to attack higher level creatures.

If you happen to get your hands on some Archmages, use their Magic Shield ability to your Horsemen. They will receive 50 % less damage from attacks for 3 rounds and it also reloads fast.

Also I sometimes used Lina's Ice Orb for distraction. Toss the Ice Orb right next to the shooters. It can take quite a lot of damage.