Not sure if you already know this, if you do, i apologize for telling it again
On the weapon you should have enhanced effect, it will increase your dmg. Since your weapon is lvl 15 with 56ee, its equal to a lvl 20 weapon with 36ee.( Iam not 100% sure about the exact stats)
So if you would find a lvl 20 weapon with 40+ ee it would probably make more dmg.
On the armor i would recommend you, especially for HC to have enhanced effect on it, you will get lower hits from the monsters. Probably additional life on the armor wouldnt be too bad.
If you use axes your charms should have str/dex, that will increase your dmg, if you are going to use swords then your charms should have str on it. If you should ever use Daggers on any chars the charms should have dex