Spells: Aoe mez not being over written by higher level mez

[Vermicelli]

I always suspected this was wrong! Thank yall for bringing it up =) On P99, I remember AoE Mesmerizing kobolds in SolB before Kunark dropped, then getting flattened by the ensuing train because I couldn't single-target Mez any of them because they were already AoE Mezzed. My tactic at that time was to AoE Mez, then Tash and root each one, then single-Mez after AoE Mesmerization broke. It was incredibly mana-intensive, but manageable after the spawn times were broken up. It would be so cash if single-target Mezzes could overwrite Mesmerization, which is level 16 and doesn't last as long as single-target.