The factions are as follows:
Abyssal Plague Demons - demons, 6 monsters, lvls 5-9
Barrowhaunts - ghosts of adventurers, 6 monsters, lvls 7-9
Bitterstrike - Dragon & its (largely fey) allies, 6 monsters, lvls 8-10
Blackfang Gnolls - gnolls, 6 monsters, lvls 6-8
Bloodfire ooze - an ooze, 1 monster, lvl 7
Boggle - a type of fey, 4 monsters, lvls 3-5
Cadavar Collector - a construct & its master, 2 monsters, lvl 9
Calastryx - dragon & its potential followers, 2 monsters, lvls 14 & 4
Clan Bloodspear - orks, some other humanoids, 8 monsters, lvls 4-10
Daggerburg Goblins - goblinoids + mount, 11 monsters, lvls 4-9
Dark Drake of the Moon Hills - drakes, 3 monsters, lvls 6, 7 & 8
Dythan's Legion - dragonborn + "mounts", 7 monsters, lvls 11-15
Fell Court - Tieflings, 6 monsters, lvls 2-5
Felldrake - drakes, 4 monsters, lvls 1-4
Frost Witches - witches & followers, 5 monsters, lvls 6, 8, 12, 15, 18
Gravelstoke Family - humans, 5 monsters, lvls 12-16
Gray Company - humans + 1 undead, 5 monsters, lvls 6-9
Hearken's Heart - druids & dryads, 4 monsters, lvls 7-10
Hounds of Ill Omen - undead, 3 monsters, lvls 7-10
Hunter Spiders - drow, 4 monsters, lvls 15-17
Hurly-Burly Brothers - trolls, 1 monster, lvl 9
Iron Circle - human + 2 demons, 7 monsters, lvls 3-5
Mages of Saruun - mages & followers, 6 monsters, lvls 8-14
Mooncalf - aberation, 4 monsters, lvls 10-15
Penanggalan - undead, 3 monsters, lvl 8, 9, 10
Peryton - beast, 2 monsters, lvls 4 & 6
Phantom Brigade - undead, 6 monsters, lvls 6-8, 12 & 14
Ragewind - construct, 1 monster, lvl 18
Raven Roost Bandits - bandits, 9 monsters, lvls 4-8
River Rats - criminals, 6 monsters, lvls 2-5
Scroll Mummy - construct, 1 monster, lvl 15
Shadowmire - dragon, 1 monster, lvl 19
Tigerclaw Barbarians - barbarians + mounts, 8 monsters, lvl 3-8
Treants of Nentir Vale - treants & woads, 6 monsters, lvl 11-20
Twig Blight - plants, 4 monsters, lvl 1-5
Vampiric Mist - undead, 4 monsters 9, 9, 11, 19
Vestapalk - dragon & kobold pal, 2 monsters, lvl 6 & 13
Wandering Tower - aberations + others, 3 monsters + hazard, lvl 14, 15, 18, 18
Witchlight Lizardfolk - lizardmen, 8 monsters, lvl 3-7
Wolf Runners - bandits, 3 monsters, lvl 5, 5, 6