It's better for the lipo if you don't hit the lvc every time. Apparently it can shorten their life if you consistently discharge more than 80% of the pack.
I am running a eight-t with a mmm 2.5d nue and a hyperion vx 5c 6500 batt and i can seem to hit lvc i go for close to thirty min and its still strong.This thing is wicked out of the hole.