It all depends, wants on your team that matters. Yes Life orb would certainly not waste a mega space on your team (so you can have somebody else instead) but Mega Lucario Steel+Fighting moves hit twice as hard! Moves Like Aura Sphere base power is 90 but used by Mega Lucario would be 180 instead of Lucario's 135!
Seems complicated I kno lol! I can explain it tomorrow if u like! While trading or battling. I might have some good extra pokemon if you want as well (4 perfect IV's!) Im off to sleep now, my bad lol








