Given how Conjurers can spam Totems alongside one Incarnate, they can easily overpower the enemy in a couple of turns with an army of little demons. With these in mind, Conjurers are expected to use Dimensional Bolt to create random surfaces that their Incarnates and Totems adapt. Moreover, Conjurers begin with a Dimensional Bolt (Summoning), Conjure Incarnate (Summoning), and Elemental Totem (Summoning) Skills. This perk alone opens up a huge portion of the world for quirky dialogue and interesting side-quests. On the get-go, Conjurers become a must-use Class as their Pet Pal Talent allows them to talk to animals.
They come with +1 Intelligence and +2 Constitution, alongside +1 Summoning, +1 Loremaster, and +1 Leadership.
In the context of Original Sin 2's lore, Conjurers gain the ability to conjure a trusted personal demon and a variety of elemental totems to manipulate the tide of battle. Conjurers in Original Sin 2 act as its traditional summoner counterpart in most MMOs.