I almost caused a TPK in a big fight right now by dropping ice storm on top of my team. Everyone still took massive damage, and it killed Shadowheart’s divine guardian which she had just casted. Read your spells carefully before assuming it’s safe to cast them on top of your party!
Yeah, the half-damage-on-save with careful spell is mainly useful if you have a rogue with Evasion (takes no damage in those conditions).