I had fatigue on Abilify. I ended up taking it before bed (even though I believe it is supposed to be taken in the mornings). Taking it at night allowed me to sleep off the worst of the fatigue.

Adderall shouldn't be making you tired. I don't know about Wellbutrin but I don't think it has a sedating effect. And I'm not sure about Lamictal - I haven't had any fatigue on it. But it might be a side effect.