Firstly, what years were Alric and Mauriac born in? We know Alric wasn't old enough to rule in 2468, when he and his family had to flee Covenant, with Mauriac acting as Prince Regent, but TFL takes place in 2480-81, and Myth 2 in 2540. Now, Mauriac was still alive in 2540
Mauriac likely didn't have magic to extend his lifespan, so he was probably in his 20s when he became Prince Regent, and then his 90s when considered ancient. If Alric was around 14 when fleeing Covenant, then he'd be 26 in TFL and 86 in Myth 2. If he was 7, then 19 in TFL and 79 in Myth 2. He didn't sound 19-20 to me in TFL, but I suppose it's possible."Mauriac, ancient and honored, still speaks of his time with the Legion and their victory over Balor. Many of the great military minds of our day sharpened their skills under his command."
Also, who was Caliban? He made the peace with the fir'Bolg a year before Alric's family had to flee Covenant, so he isn't another name for the underaged Alric. Perhaps Alric's father? Another of The Nine? He was important enough to meet with the fir'Bolg Great King, ou'Kahn to forge a truce, but notably wasn't given a title, unlike ou'Kahn.
Next question, who was the moustachioed man in the TFL intro? The guy with the hood in the tent when they unbox The Head. We know the Berserk was Truan, the Avatara likely either Alric, Murgen, or Maeldun, and any local Journeyman would be worthy to include in a council. He doesn't look like a fir'Bolg. Could that be an Avatara? Possibly Cu Roi?
Thats all I can think of for now. Hope to have a good discussion!