You may as well go the extra mile, get 80 attack, and then work off that 75 dungeoneering to at least 80 and in the intermittent, work towards a chaotic weapon
Really it all depends on what kind of pker you want. Personally if your willing to invest time into it i'd go with a zerker pure.
Say like:
80 attack
99 strength
45 defence (quested)
Either 52 for smite or 60 for chivalry or 70 for piety
94 Mage
And definitely get a chaotic, they rock lol.