I would have run the test on each AT running the Posi TF's, Synapse, Penny Yin, Citadel, Manticore. Numi's TF's and finish with an ITF.
I would also used the change name feature for evey TF so no one would recognize the toon along with changing the costume at the tailor.
To keep the names just make a new toon with the name and delete the lvl 1 toon after the test.
I also would have only run the toons with either basic SO's or IO's. Once IO sets are put in the numbers actually get more skewed due to each toon having completely different bonuses.