Most difficult enemy factions and individual types?

[Lampros]

I've primarily done Morthagi and Drauven campaign, because they seem the easiest to me. Is this the consensus for others, too? Conversely, I've done Gorgons painful, because of their stupid acid pools.

And what about individual enemy types? On Morthagi I dislike fighting Welders due to their AoE fire spray; on Drauven Pilots seem to always do some damage to my characters, unless I get rid of them before they act.

[Mike Garrison]

I think high level Drauven are the worst. They seem to get a ton of ways to do two attacks per turn, which can really devastate your party.

[Lampros]

Originally posted by Mike Garrison:

I think high level Drauven are the worst. They seem to get a ton of ways to do two attacks per turn, which can really devastate your party.

I haven't really encountered them yet, since I play Adventurer. So there are things scarier than Pilots? But I guess I will find out soon enough once I up the difficulty! ;(

[thrythlind]

The Drauven campaign was the hardest, lots of coordination and support there. But I definitely hate Wardrobes.

[Green riding hood]

Low difficulty:
(Its a mess trying to rank the enemies on lower difficulty because some builds can counter them easily while other builds dont)

1. Thrixl the specialized weaker mobs have nasty abilities overall, compete with your mystic for interfusions, seekers have high speed and high armor with a really bad binding ability and anything above is also just as bad.
2. Drauven it becomes harder once the haunt, deeven and stormthroat have been unlocked because of their abilities that hamper your action economy, the other mobs that get unlocked later on usually just have more hp.
3. Gorgon racoons shred armor so they counter warriors, the corruption is annoying, bogmoor ruins team formations and once true gorgons and gheist are unlocked it becomes a lot harder in the later chapters.
4. Morthagi acid is annoying but the only weak mob that is dangerous is the weldling, wardrobe got nerfed so it no longer spawns mob while out of sight and batchby is a melee mob that can be stunned.
5. Deepist their abilities are generally boring or dont accomplish much to hamper your heroes.

Higher difficulty:
(Using Walking lunch 100 calamities as the basis because the stronger mobs only show up in higher calamities and some mobs have abilities hidden behind calamity cards)

1. Drauven and Morthagi
Drauvens have a lot of hp, regenerate hp and the numerous redcloaks force your heroes to use up an action point to run out of range of their fireballs every turn. Its a bit difficult to pick the worst drauven to fight because the majority are generally really dangerous.
Morthagi have insane amount of hp and armor. The acid makes it really annoying to kill them in melee and the butler is your go-to target to eliminate first. Wardrobe spawning more weak mobs can be dangerous but at this point you should be able to oneshot those.
2. Thrixl still have some nasty abilities but their defense isnt as good as the drauven and morthagi. You want to take out the Kinnestend asap because they spawn mobs way too fast. The drathix dragon is a bossfight on its own and Scorier can mess up your squishies with their charge. Dominate and dreamtrap are just as bad in higher difficulty.
3. Gorgons fall off later on because they dont have the defense of drauvens or morthagi and compared to thrixl their abilities are not as dangerous. The seacaller is usually the worst mob because its a ranged unit, has a lot of hp and spawns more mobs which can setup flanking on your heroes and ruin your formation. The other mobs you can treat as just upgrades to the lower difficulty.
4. Deepists are still the weakest enemy force. Their signature is usually just a spam of horn children and a majority of melee mobs that can be stunned. They do have ranged units but its mostly physical which a warrior with knightmail can survive. The shadow hunter are the most dangerous of the group. They can jump like zealous leap, cannot be stunned, stomps down scenery ruining interfusion and they have high hp and armor making them really difficult to deal with. They are comparable to the drathix but because of the lackluster deepist army they can be easily singled out.

[Green riding hood]

https://steamcommunity.com/app/763890/discussions/0/3193621324040057913/
a thread of people discussing story campaigns difficulty