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.
Really depends on what level you are playing, I like Graveknights, pair them with a lich or a vampire, and a bunch skeletons and zombies fodder and you have a great boss battle.