The effect of Sage Spirit is:
Sage and temporarily endow its
abilities upon a targeted Sage, enhancing that
Sage's Hindsight skill so that it casts the
highest level Bolt skills.
Currently sage spirit just makes the sorcerer turn blue and changes their screen to night mode. It doesn't cause their skill auto spell to use the highest level of bolt skill learned as per its description. My sorc in the vid is under the effect of sage spirit and is only dropping lvl 5 bolts