Hm, I didn't equip it yet as I already had the Singer/Dancer one, and wanted to save the other which has sing/dance as well. Anyway, those buffs last for 20min and the reuse is 1h (40min after they wear off). For pre-40 either increase the buff duration to 40min (so you will have a 20min break until reuse) or leave the duration as is but lower the reuse to 30-35min.
What about the 40+ suggestions? We can debate the numbers and effects, they are not set in stone.
One can hope. There are very few (or none) servers with classic that are playable.
This server seems close to official and I like SOME of the personal modifications. Although I really like the additions from future updates, like Stigma reducing melee pdef AND mdef, Mass Stigma, Dance/Song modifications, Mass Recharge (yeah I play SE). :)