[Mez] <---Mez Tag. Nothing fancy here.
MezOn=1 <---Mez is on, correct.
MezRadius=50 <---Mez radius in which your mob is within your area
MezMinLevel=35 <--- Minimum Level your bard is willing to mez, any lower would be considered not needing to be mezzed, because it would be "trivial".
MezMaxLevel=53 <--- Max level your current, latest spell allows you to mez up to level 53, then this would be correct. Sionachie's Dream does in fact allow you to charm up to level 53.
MezStopHPs=80 <--- This is where you define at what hp % your bard will no longer attempt to mez any longer. If your group is hitting w/AoEs, and your bard is trying to mez them, once the mobs fall below 80%, they will stop.
MezSpell=Sionachie's Dreams <--- Your single target mez spell goes here. Sionachie's Dreams mezes up to level 53. Your MezMaxLevel is set to 53.
MezAESpell=Your AE Mez Spell|0 <--- Your AoE mez spell goes here. You do not have an AoE mez spell here, so your bard would only be mezzing single targets.
Everything you have set looks correct. You've got your Mez turned on, your radius set, your min/max levels, your stophp %, your single target Mez, but no AoE mez (but this is not required, unless you want to AoE mez).
What I would suggest is that you check by pulling two mobs with your toons properly assisting with assist set on your tank, or on the person tanking (and be sure the group is assisting), and see if your bard attempts to mez the mobs not being hit. Be sure to watch for mez breaks and sit on people's hands who can't learn to not break a mez! haha.
Anyway, I'm not sure if someone went over this for you, and I apologize if this fell on deaf ears because you already know this...But, I'm in hopes this helps you, or atleast someone viewing!
Cheers,
