The main role of Enchanters in group situations is to keep the entire group buffed with a mana regeneration spells, mesmerize any additional enemies that come with the single monster pulled, and to slow every enemy the group encounters, making them manageable and much easier to kill.
Some Enchanters get involved with the soloing aspect of their class, but this is extremely dangerous and can easily turn into death. For an Enchanter to solo, it’s almost a necessity to Charm enemies and use them to fight others. If during a fight, the charm effect breaks, both enemies immediately turn on the Enchanter and there is a short window of opportunity to recast the Charm before death, especially at higher levels.