I really enjoy delves for the most part. They’re fun, challenging, and it’s nice to see our troops be able to pseudo-level past 20 to match ever increasing difficulty levels.
But there’s two things that bother me about the entire format.
One is the chance-based instakills, the other is the encounters with units that can mess around your team’s order. With your team unable to change between encounters, these two things can instantly ruin your run.
Some are worse than others. The dust devil encounter isn’t particularly bad or difficult, but it is -annoying-. Effectively, since they start at full mana, you have to just sit around and wait for them to charge up their abilities enough times to rearrange your team to its original form. It just stretches the encounter out way too long for no particular reason.
On the other hand, there’s stuff like Kruarg the Dread, with a 5% chance to devour on skull damage, or the Bullettes, who both shuffle your team around and have a chance to devour.
It’s fine to have the final encounter do this, but not the ones inbetween. Sometimes, pure luck can end a run on the spot. I just had an encounter with the bullette lair, managed to kill one of the two, but then the AI got five turns in a row, ending with the bullette firing his attack, knocking my team around, and then devouring my most valuable team member. There was nothing I could have done to stop that. It was just purely bad luck.
So my suggestion is: Allow the team to return to its original formation after each battle, and remove all chance based one-shot mechanisms from delves. No more death mark or chance-based devours. It only serves to make an otherwise great gamemode frustrating.