I based the estimate of 4/5 outfits on the total free training for the event netting around 200k of stats, I figured you could go for a 100k/100k/0 build and get lucky for the fifth prize. Any stats past there were moot anyway because the event is limited, Santa could go infinite on battle 6 for all the impact on f2p.

Ashes posted the pic of all the outfits, so I credited them with it.