Asisreo
Patron Badass
I've used grouped initiative since day one of DMing 5e and my players have yet to TPK because of it. It does get scary and players have even died from it, but it's only ever the wizard or sorcerer who decided they wanted to be the front-liner for no reason.Disagree. Side initiative is the recipe for random TPKs because the monsters get can two consecutive rounds of combat agains the PCs. We abandoned that in the early 80s very fast. Individual initiative is available in the Basic Moldvay book.
Side initiative is a relic of old school rank & file battlefield war-games. I fully understand why Gygax-Arneson used that. They were creating the game from scratch. For me, it has no place in a game (D&D) about skirmish fights at the squad level. If combat is a bit little longer I don't mind.
The problem is elsewhere. Too many games concentrates on putting fights back to back to award XPs and level up, then complain about combat time. Drop XPs per encounter in favour of story XPs or set XPs after a number of games. It will change how you and your players play the game.
It's actually an elegant solution to the problem "my high AC player can't get hit unless I design spellcasters every encounter." High AC characters getting surrounded has two things. 1. They can't move and 2. They get attacked roughly 8 times on the first round and even at 25% to-hit for the monsters, they're likely to get hit once.
Edit: assuming roughly 8 monsters.