Personally, I do water changes in the evenings, but this has to do with my free-time schedule.
I dose Prime (to treat the new water), Flourish Comprehensive, Flourish Phosphorus and Equilibrium (GH/K) with my water changes.
There's not much point to dosing Excel when the lights are about to go out, unless you are going to spot-treat algae. So I do NOT dose excel with my water changes.
I dose Excel (ok, I use API CO2 booster, same idea) daily, in the mornings right after my lights come on. I do this regardless of water change the evening before.
I do a mid-week second dose of Flourish comprehensive, Flourish Phosphorus, and Leaf Zone (K+Fe), and dose this one with one of my morning Excel doses.