#2 - April 19, 2012, 4:41 a.m.
Mistweavers essentially have two weapon options: a two-handed staff, or a caster weapon and an off-hand. They won't be able to heal with Agility weapons (the monk will have no spellpower) and may not even be able to dual wield (since you can't dual wield caster weapons).
Mistweavers who want to melee a lot will do more dps with a staff (though caster staves do less damage than melee staves), but we can make sure the healing is the same whether using a staff or a healer mace / dagger / sword.
It's also not the end of the world if healer monks slightly prefer staves, since not all healers want staves.