Really...best of luck, but I used the phrase "inner peace" because I think you're chasing a ghost. I don't really think you have a problem with 95-100C temps (200-210F) in stop and go/idle in Houston.
As you know, the pusher fans basically create about the same airflow they block, and a bigger pusher fan will probably do the same thing (more blockage/more created airflow)...a lot of work versus more simple alternatives. You might get more out of comparing your CCI's specs versus a Spal's or the Ford unit's.
As to Water Wetter...make your own choice. My ag clients use it in their farm vehicles (gas and diesel formulas) in the San Joaquin and down in Yuma-Imperial Valley without coolant. Farmers aren't prone to wasting money on bullsh!t.
Best of luck.
