Seems like hoplites and other greek units are invincible or "die hard"
Massilia has conquered almost all Gallia!! The Gauls has no chance against them!! Even I, playing as Rome, have problems against hoplites and macedonic phalange. I found it pretty strange but I could be wrong...what do you think about it?
I'm playing my campaign hard/very hard.
P.S. I've noticed the same thing with Lugii tribe.