The main reason for WIS 55 is to have full assistant skills.
But for Bursting/Goddess Training, you only need WIS18.

And WIS18 in level 50 has often SPmax of 3XX and sometimes 4XX.
It is not good, if you use Grape Syrups for filling SPmax up.

My Fugo lv 144 has WIS 75 and is a Fire Fighter. So it is no problem to have high wisdom. ^^