I have a group that is very mobile and I want to start challenging them more/give the enemy caster a turn or two to get cooking. What are some good enemy frontliners? I realize I could just have the frontliners they run past just do the same thing and go after the casters, but that feels a bit chaotics and I like me a nice setpiece now and then.
One of my favorite encounters when I ran 5e was using a roper on the ceiling while the party fought a couple ghouls. The bard and wizard were very surprised 👹