BGM_Dungeon_Uru 5 (aka Halatali [Hard] theme) is Birds of a Feather, track 82 on the Before Meteor OST. (Originally used for Chocobo Caravans)
BGM_Dungeon_Uru 6 (aka Halatali [Hard] boss/battle? theme) is Beneath Bloodied Banners, track 29 on the Before Meteor OST.
BGM_Boss_05 is Phantoms on the Lake, track 24 on the Before Meteor OST. (Originally used for battles in Mor Dhona)
BGM_Dungeon_Gri 6 is Wrath of the Eikons, track 65 on the Before Meteor OST. (Originally used when the Amalj'aa summoned Ifrit during the 1.0 MSQ)
BGM_Dungeon_Lim 5 (aka Brayflox) is Fury, track 60 on the Before Meteor OST. (Originally used for cutscenes and a few MSQ fights during 1.0?)
BGM_Event_Neal is Meteor, track 88 on the Before Meteor OST. (Originally used for Nael-centric cutscenes dealing with the 7UE)
BGM_Con_Carteneau is Rise of the White Raven, track 103 on the Before Meteor OST. (Originally used for Nael Deus Darnus fight)
I heard they readded Tempest (used for the Nael van Darnus fight / phase 1 of Rivenroad) but I don't see it currently.
EDIT: Hours later I found Tempest
BGM_Con_Neal is Tempest, track 102 on the Before Meteor OST. (Originally used for Coerthas Faction battlecraft leves, then removed and used for phase 1 of Rivenroad versus Nael van Darnus)