Lol yoshi, think im getting towards the end of the game whilst your still beginning xD
My dual wield specialty rogue/assasin/duelist destroys all! Evasion (20% chance of evading all attacks) kicks ass, and with the new scale armor set ive got he can shrug of spells whilst backstabbing at ridiculously high DPS....with posion blades
I've just fought two epic battles against the largest enemies (won't mention what for spoiler purposes) and breezed through them - think i've got a good party setup tho:
1 Tank (heaviest armor, highest defence, draws the fire)
1 healer (buffs the tank)
1 backstabber (me, picks off from behind)
1 mage damager (debuffs and throws ice/fire etc)
This seems to work really well, one great tip i'd recommend is find the certain shops that sell unlimited elfroot and lyrium dust, and craft yourself a shitload of basic mana and health pots - that way your two mages can munch on them like candy during battles!