It’s really useful for act 1 at least, where most casters have one spell, and it’s called “miss”.
Casters often feel at a massive disadvantage for casual fights. For a boss fight, casters are often the strongest, since you’ll blow all your spell slots. But for smaller fights, you want to preserve your spell slots and cantrips simply cannot keep up with martials. I mean, a single attack roll for a spell cantrip vs getting 2-3 attack roles that also do more damage total? Heck, my strongest martials can usually do at least double the damage of a spell caster’s cantrips.
Though at the same time, when I can blow the spell slot, no martial can outdo the AoE damage of reliable ol’ fireball or the likes. Just I can’t justify using my spell slots on a small number of weak enemies.
I’ve started to use my spells more and then resting more because you actually need to sleep to progress some story lines. I don’t think I did that enough for Act 1 and most of Act 2.
Also my gf and melee tanks many times also needed a full rest and I still had most of my spells slots so that wasn’t fun.
Though I might need to amp the difficulty a bit.
BG3 saves the day for low level casters by making rest and spell prep such a non-issue. Use it all. Rest rest and rest.
