Hi Guilherme:
I have been flying an electric Legacy for about 3 years. Motor is OS 3825, 750 KV, 5-cell 3000 mAh batteries, FM9 timer, Castle Phoenix ESC. I have had best results with APC 12-6 EP (reverse rotation) prop. I have tried the APC 13-4.5 but prefer the 12-6. My model weighs 64 oz. ready to fly, about the same as yours. Lines are about 65 feet handle to center of model, about 19.8m. I set it for 5.4 second lap times. This setup uses about 1800-1900 ma for a 6-minute flight, so the 2700 mAh batteries should be fine and leave you with plenty of reserve capacity. Your setup sounds very similar to mine, though I don't know what KV rating your E-32 has.
I suggest you set the timer for at least 6 minutes since 5 minutes is not enough to complete the pattern and have any cushion of safety. My timer is set for 6 mins 20 seconds, and I still have plenty of reserve power in the battery at the end of the flight, plus can do a few outside loops to unwind the lines before landing.