The Tinker character is definitely interesting, but it sounds like you’ve run into a bug or limitation with the skill tree. One way to strengthen the Tinker is to focus on maximizing the synergy between your existing spells and equipment. For example, instead of relying solely on the extra spells skill, consider upgrading your crafting abilities to produce high-quality items that complement your spells. Pairing these items with allies who have strong offensive or defensive capabilities can also make a big difference.
That said, if the extra spells skill isn’t working as intended, you might want to report it as a bug to the developers—it could be something they need to patch.
By the way, this reminds me of how crucial it is to stay on top of updates, whether it’s for games or real-life processes like checking your grant application status. For example, in South Africa, people use tools like the SASSA SRD status check to track their progress with applications. Similarly, keeping track of game updates or community fixes can help improve your experience with Tinker.