Fluoro and LEDs together

More the merrier, I'd use the led on all 3, red + blue + white veg through flower. A more complete light spectrum is better overall. try to mimic the sun as best as you can. Fluoro lights are less efficient then LED's in terms of hydro consumption and spectrum output but mixing them will not harm anything if anything the LED's will help round it all out. Higher end LED's can burn your plants if they get to close where as t5's and lower end led's not so much. Given your led light is 80W I would say it can be the same distance from your canopy as the t5's Good Luck!