Hello all, I am prepping a massive sandbox set to start next month and so I seeded it with a ton of different bits of adventure material I had in my kind of absurdly large collection. Don't judge, I've been collecting the damn things for over 20 years. :P
Anyway, the game will be run in 5e, which is obviously, a completely different system to previous editions. It might look similar, but it really is quite different. So I have adventure material not just from 5e but also from AD&D and 2E, 3E/3.5, Pathfinder, and 4E. I have drawn from some other games such as Warhammer FRP and Call of Cthulhu but those require a completely different attitude toward conversion.
So what I am looking to do is be able to make some quick and dirty conversions at the table. It doesn't need to be pretty, it just needs to work. When I can I am just going to pull the same monster from the Monster Manual but that's not always an option. Have any of you done this? I did some searching online and found a few things that talked about 3.5/PF conversions on the fly, but nothing else really. I just need to know quick ways to adjust HP, attacks, abilities, stats, and save DCs for different editions. Saving Throws and Skills/Proficiencies are pretty straightforward. I've run enough 5e at this point to understand the system pretty well, of course, it's a pretty light system.