I'd go 5 IF and put 1 more into athletics, and 2 more into WM.
WM not only increasing the damage you do, it also makes your weapons swing faster, and lowers your chance of getting hit with upkeep on weapons.
Not to mention, IF is a defensive skill, WM is an offensive skill. Ideally you kill them before they hit you. I always prefer an offensive skill versus a passive defensive skill.