Is bard charm worthless, or am I doing something wrong?

[Yardcore]

When I was playing my bard back in the day, 2 factors that are helping me the most are the instrument level that I am using and +Cha gears. I noticed that it lasted a lot longer when I used +Cha gears vs regular gears.

[Lazortag]

I believe the kunark .spdat showed that Bard charm only lasts 2 (3?) ticks. If you find classic evidence of it lasting longer that would be sweet (can try castersrealm or everlore on the wayback machine).

Also, the higher level charm is better because it caps at 51 instead of 37, but obviously you should use the lower one if you're fighting specs/other sub-37 mobs because it costs no mana.