Talk to a transmission guy, as that is the weak link in the system. What I get is use 1800 rpm or more to keep the transmission coolant flow, lube circuit pressure up, and clutch pressures up.
I am talking to a XXX transmission guy as to how to keep my stock transmission in the best shape until i can get it modified next spring. After the XXX modifications it seems that the transmission will work MUCH better, tow better, cooler. transmission heat seems to be the best gauge to manage it with and the hottest place to put the gauge is the crossover line at the transmission end.
Seems transmission mods first then engine mods or it blows the transmission with the engine mods.
Good Luck
Bob