To support your goals in enhancing neuroplasticity, cognitive function, memory, verbal fluency, and reducing mental fatigue, here are some supplements that can be beneficial, along with a bit of how they might work:

1. Nootropics: These are substances that may enhance cognitive function, particularly executive functions, memory, creativity, or motivation in healthy individuals. Examples include:

   • L-Theanine: Often found in tea, L-Theanine can promote relaxation and increase the production of alpha waves in the brain, which might support cognitive enhancement and focus¹.
   • Rhodiola Rosea: This adaptogen might help reduce mental fatigue and improve cognitive function, particularly under stress¹.

2. Bacopa Monnieri: Known for its ability to support memory and cognitive processing. It's often used in traditional medicine for its positive effects on learning retention¹.

3. Ginkgo Biloba: This herbal supplement is believed to improve blood circulation to the brain, potentially enhancing memory and cognitive speed¹.

4. Citicoline: This compound provides precursors for phospholipids to maintain healthy brain cells and has shown potential in enhancing mental energy, focus, and overall cognitive function¹.

5. Lion’s Mane Mushroom: This mushroom contains compounds that might stimulate the growth of brain cells and improve memory function¹.

6. Curcumin: The active compound in turmeric, has properties that may promote neuroplasticity and are often used to enhance brain health due to its antioxidant and anti-inflammatory properties¹.

Your current protocol of a multivitamin and Omega-3 Fish Oil already provides a strong foundation, as Omega-3s are critical for maintaining optimal brain function¹.

I would recommend considering the above suggestions in conjunction with consulting a healthcare professional. Every individual's needs are unique, and a healthcare professional can provide advice tailored to your specific circumstances and health conditions.