No, melee doesn't need aggro. This is not your theme-park MMO. This game is mainly meant as a SP RPG game, you need to find a way to protect your party members in other ways, not the boring "trinity" stuff. Maybe you should not make your mage glass-cannon only and think about his own protection as well. Maybe you melee should not be a damage sponge but a brutal front line damage dealer that can kill enemies before they reach your mages.
My mage literally has the Glass Cannon talent and I survive just fine so far in normal with 1-2 points spent in Speed. Keep your distance, invest 1 point in Aerothurge for Teleport and 1 point in Hyddrosophist for Minor Heal and you should do fine.
