This app was mentioned in 5 comments, with an average of 4.40 upvotes
I agree with /u/aubreysux. Vengeance games are very few of the games we play because they're a bit cumbersome.
My friends and I use the sentinels randomizer. We randomize 3 villains and choose one, then randomize 3 heroes for each of us and choose one. (We each get three options to choose one). We do the same fo environment.
Going off this, get the Randomizer App for your phone so it can randomize heroes, villains, and environments. Makes for some fun narratives.
I haven't played the digital version of the game, but I use the companion app to help build my play scenarios. You might find it helpful. :)
This won't help with strategy, but there are certain combinations of heroes, villains and environment that provide a range of difficulty.
https://play.google.com/store/apps/details?id=com.idunnolol.sotm&hl=en
in case ya know you actually want to look at the app.
I also wrote this, based on the same data set: https://play.google.com/store/apps/details?id=com.idunnolol.sotm