There are several misunderstandings about DND magic and this game.

1) you cannot have 99 magic stones. You can never have more than three. It says that in the rules.

2) you cannot spawn 4 mage hands per caster.

3) the gust cantrip is not in Baldur’s Gate 3, same with some other spells you mention.

4) bladeward is not overpowered. Because it takes an action it is basically useless. I have never seen anybody cast this spell in combat in all my years of playing.