I’ve gone for a pure DPS…basically put all points into STR, then use your 2 attack boosting abilities from the swordmaster. I’m still playing lv 30 area, but the damage just rapes bosses.
Maybe put just a few points into CON but ultimately carry lots of hp/mp pots and you will be ok.
If possible learn a deal wield skill.
Also as a basic strategy guide…you will want to farm a bit of gold, buy an attribute, wait until its unlocked, while you wait farm gold and then come back and unlock more…repeat this until you have some decent stats this will make your build more robust because you will be levelling up the power of your attack boosting abilities…this will give you untouchable damage!