Sages can Vertical Firewall or Firewall.
They also can use SC or FD and have FB and LB to help. Too many newbie sages play the class I feel since Siromas and Imps have pretty much made the job 10x easier to level.
Spellbreaker can stop many monsters from summoning slaves, not only boss types try to summon these things. Even so, its worth it to try with a 10% chance cause you'll possibly get 2-3 of these off before mob is summoned.
They aren't amazing but...they can get by probably. Still better than some builds/classes in ToH if they go in as caster type. Autobolt would rely on the bolts activating and using that flee they got to kill things.