What is an enchanter's roll in AOE groups?

[vageta31]

We just did this exact grouping earlier today. Bard, cleric, enchanter and two wizzies. Bards rounds up mobs and brings to zone, cleric heals him then bard zones. Eventually all the mobs make it to zoneline, cleric DA's and runs forward to bunch mobs tight. Chanter stands in middle and stun locks while wizzies burn down. Apparently it's safer with 2 chanters for the times when mobs resist stun and bash chanter, but it worked ok with only one due to mobs being low enough to not resist often.