1 extra power strike from 5 -> 6 really isnt anything worth losing power draw over.
With 15 agi (5 athletics) you're not going to outrun ninjas and people like Lurk who just hunt archers. But with the light armor you'll out run most of the community.
The only other reasonable build might have 21 str because 7 PD is working for me (Not level 30 yet). However anything less and you'll just be one of those hit once, run, hit once, run, rinse & repeat archers. Maybe killing lower armored targets every now and then but not doing crap against armor. I've had super fast archers shoot my 2hander using a tunic with mail and it just snaps right off. Doing 1/100 dmg at most lol.
So basically what it comes down to as an archer is, WM, Ath, PD, and if you want to not be useless up close, PS. 24/15 has to be my fav build as an archer due to its intense power even after all these nerfs, good accuracy, 1 shots on anything with weakish armor and less than 2-3 IF, speed, and versatility in melee. I'm not the best fighter, but I'm not the worst. And if you click that langes messer into 2hander you're in the same ballpark as most players in public matches.