I think its a good Idea to upgrade the Dorcus.
But i think adding more hp and more damage to demihuman would be to much, heres what i think
Dex+15, Str+20, Int+20/25, 5%more SP, (3%more attack) not sure with that, WeaponAttack 200 and weaponlevel 4
I'm not sure if thats ok, its just my idea :p