I think it would be cool if Zandronum supported some more settings for custom skill levels. Mainly SpawnMulti and PlayerRespawn so you can have skill levels that are essentially solonet, which is great for testing stuff.
Skill level discussion here:
https://timeofdoom.proboards.com/post/696/thread
Custom skill wad I whipped up and linked there:
https://www.mediafire.com/file/tfi51slq ... l.wad/file
Although some skills are currently redundant or pointless in Zandronum. Fortunately Zandronum just simply shows error warnings on startup and still works fine.
Nightmare Lite (like easiest skill except with fast monsters and monster respawn, 2x ammo)
Nightmare Multi Lite (same except multiplayer only things appear)
Easy but fast (Hey Not Too Rough Now with fast monsters)
Hurt Me Plenty (unchanged)
Medium Fast (HMP with fast monsters)
Medium Multi (HMP with fast monsters and multi only things)
Medium Rare (Medium Nightmare - 2x ammo, fast, respawn, multi things)
Ultra-Violence (unchanged)
UV Fast (exactly that)
UV Fast More (add multi things and 2x ammo, actually spawnfilter 5 instead of 4 if a Hexen/UDMF format map has things different)
Nightmare (unchanged)
Nightmare SoloNet (multi things and player respawning doesn't restart map + TotalInfighting + Keys show on automap + Bossbrain shoots slower)
Here's good examples of all these additional selections:
E1M1 of Ultimate Doom will have a berserk pack only on Nightmare Multi Lite, Medium Multi, and Medium Rare.
In Doom 2 on Medium Multi, Medium Rare, UV Fast More, and Nightmare Solonet, expect more maps to have a cyberdemon.
The current updated possibilities in GZDoom/LZDoom:
https://zdoom.org/wiki/MAPINFO/Skill_definition