Good day! I watched your first stream of my map. Regarding the questions that came up during the playthrough...
Regarding the missing music in the intro cinematic — it's actually there; it most likely didn't play because of the music mod(s) you have installed, as evidenced by the Shadow Fight 2 tracks playing during combat, for example. Though I could be wrong.
Regarding the phoenixes — here they have an elemental nature rather than a living one (see the "Change Log"), so that things like "Regeneration" can't be cast on them. Otherwise, a summoned phoenix would become practically unkillable imba.
Regarding Nicolas's specialty — the more often your stacks act in combat and the higher the hero's level, the more often reinforcements arrive. And you fought as Nicolas mostly with a single stack of vampires — the one/two suicide skeletons were dying almost immediately. In effect, starting around turn 3, you had not 7 stacks acting per turn, but 1. That's why the specialty triggered so rarely.
Against Robin, of course, you could have fielded all the accumulated "fodder," but you managed just fine without it :)
Regarding the appearance of alt-upgrades for partisans during ambushes — that's a feature. The thread header states that alts are banned, but not for neutrals. And the monk (partisan commander) fights under the "neutral" flag. Besides, honestly, anyone who felt like it joined the partisans.
Regarding their fierce tent — it has Kaspar's boosted specialty + the machinist's ring. There's also a note about the number of shots/actions in the "Change Log." It can be destroyed, by the way, but it takes several attempts, since the monk doesn't fully repair the tent — only half the HP it had before taking damage. And yes, your reaction (timestamp 2:16:27) to the first attempts to destroy it is priceless =)
P.S. Break a leg on your exams!