Headcanon where Gale is the famous professor in the academy for being one of the few professors who actually had a great perilous adventure but none of the students (and some staff too) believe it really happened.
Like they file it away as one of those things where he probably just saw it at the sidelines not really like thick in battle since he has the orb to worry about.
Until finally one day Gale holds a special series of seminars/demonstrations for in the field spellcasting for fights or crisis. He invited all the party members he could in these seminars
Suddenly a former shar worhipper, gith, vampire, devil, is that the blade of frontiers(?), the legendary jaheira and the hero of baldurs gate just are there to help the demo/seminar.
A nighttime demo for Astarion, A lesson on how to cast light spells and be alert for rogues. Not to mention how to maintain concentration when you get shot by an arrow, Gale will say as Astarion shoots an arrow at him. ( at some point an arrow does sink in Gale's shoulder and the whole class freezes but Gale just tuts disapprovingly while Astarion just acts innocently like he doesnt have a longbow in his hand)
Karlach makes a demo on how to distinguish devils and how to kill them. She and Gale also show how to deal with a raging barbarian in a fight as a wizard, Hint human shields i mean tanks companions are important.
Wyll is charming the socks of the audience and shows self-defense tactics when an enemy too close. Oh yes he used to be a warlock but his patron was a devil so he had to cut ties with her
Shadowheart talks about healing spells and being aware of the your companions healths. She especially emphasizes the importance of being able to self heal in emergencies especially for wizards while giving pointed looks at Gale while Gale awkwardly(or guiltily?) shuffles and clears his throat
Laezel talks about the battlefield positions and best placement of wizards in the field to help the strongest soldiers and she also shows which of the body parts they should aim their spells. (I like imagining Laezel having her baby strapped on her while doing her demo or using her baby to show which body parts)
And after a while the students realize with how Gale seamlessly shows or helps in the demos that omg maybe professor Dekarios did help save the baldurs gate
