Another fun one: Lightning damage type Fire Shield with level 6 Tempest. Knocks people back 10 feet on every hit on you, good luck getting your full multi-attack routine off on an already hard-to-hurt target (since it's an armored wizard + gets great positioning options from Manifest Mind). Bonus points if you just stand at the exit of the Wall of Lightning or Evard's Lightning Tentacles and they get knocked back into it.