The purpose of this video is to share my considerations for the best Wizard spells that you can have in your grimoire throughout your adventures in Pillars of Eternity.
There are definitely a lot of spell choices in this game, a lot of them quite good, others not so much. These are my suggestions for your best picks for a balanced Grimoire that features defensive and offensive capabilities, both in control as well as firepower.
Naturally this is not the only way to play your wizard, different spells may be better suited for certain situations and playstyles, but through my experience in the game, these are by far the ones that have proved the most effective, more often.

Note: This spell selection is made based on playing on the hardest difficulty (Path of the Damned) and works very well for a Triple Crown achievement run.
If you want to see this selection in action, here is my full triple crown playthrough where this was recorded off -    • Pillars of Eternity (Triple Crown)  

New Player Guide -    • Pillars of Eternity - New Player Guide  

Timestamps:
00:00 Intro
01:16 Level 1
08:43 Level 2
14:36 Level 3
21:08 Level 4
26:06 Level 5
33:05 Level 6
39:41 Level 7
43:52 Level 8
49:49 Mastered Spells (per encounter)
52:14 Conclusion

Thank you for watching!