I think that gladys are really strong in oly, just overpowered !! some much HP/CP and they hit from distance with sonic tec ... and make a lot of dmg !! they practicly own all classes, but it's more funny to play a paladin class in oly, because u dont just use shield(glady's duals ...)
and u have some more skills.
ofc, every class is good, if u know how to play with em. I remember a OL who used his skills just a little bit, and run all of the time... with a big dex... so he didnt have a big mana consumption ...