I've done 6-9 PS with 1h, using the weak swords up through +3 warhammer. Regardless of build, it takes a crap ton of swings to kill strength builds in heavy armor with a 1h weapon.
The main purpose of power strike and wpf on a 1h is to avoid glancing and increase "effective" speed (more PS=wider sweetspots=you can hit earlier in the animation=faster "effective" speed). Don't expect to kill people in fewer swings, just that you will actually be able to land your swings.
That said, I say add throwing as you level up. 18/21 with 5 power throw exactly maxes out all your skills at lvl 35 (IF/shield/WM/PS/ath). Similarly, you could shoot for 5-7 riding. But if you get to lvl 33+ and don't have some kind of hybrid (throwing, riding, pole, etc), you will be bored out of your mind.