Every now and again, your party insists on splitting and fighting in two different places at once.
At least mine does.
For a while, I struggled with keeping things interesting for all parties involved, until I hit on the most obvious, simple idea.
I put everyone in one massive initiative order, and simply “swap scenes” as I go down the list.
Like I said, it’s pretty obvious in retrospect, but it works well, and my players liked it since it keeps everyone engaged in both fights.
It also works for out of combat stuff – you can go around the room (or alphabetically if you want to be less obvious) and adjudicate actions as you go, one “round” at a time as the party goes about its various business.
If your players are like mine, give it a shot.
Dear Players: There’s a Better Way to Play – The Angry GM
Roleplaying 101: Improvising Your Way to Victory – DnDBeyond
As a DM I’ll tell PCs what they feel – Sage Advice
Do This Often To Keep Your Players Engaged – Roleplaying Tips
Easy Peasy Wound Tracking In Combat – Roleplaying Tips
A Great Way To Design Hazards – Roleplaying Tips
What’s A Hazard? What’s A Trap? – Roleplaying Tips
Trollskull Tavern Management – DMsGuild – $0.50
Random Book Table – DMsGuild – Free
The Long Rest Generator – DMsGuild – $1.49
Now get out there and tell a story!