What’s the best build for Wizard?

[Solaire]

My wizard keeps getting destroyed when facing certain enemies so what’s good so my wizard doesn’t get destroyed?

[Nani!?!?]

Stay away from enemies

Move to high ground for advantage

Cast buff spells at first turn or prior to combat

Take Abjuration spells

[MachineGod]

Make sure you power up STD before melee attacks

[ACS36]

Get mirror image(probably one of the best defensive spells in the game for any caster) Stand far away from stuff and get to the high ground if you can.

[Morgian]

Take a long look at the spells and pick some of those that last until a long rest, especially if they give you mobility (shield is a good one, too). Check if a spell needs concentration, and if it does, ignore it, unless you really want that effect. You can hold up only one of those at the same time and you are likely to drop it when damaged.
Don't neglect strength completely and get Athletics skill if you can. Jumping is important in this game and allows for some nice tricks.

[Nani!?!?]

Remember that spells can combo as well, grease+fire = explosion and burning patch whereas create water+ice spell creates a large slick spot, and create water+lightning creates an electric stun zone