Might want to list what kind of weapons you are wanting to use... ranged, 2h, pole, 1h, 1h/shield, cavalry, Hybrid?
My advice for if you have poor frames is stay away from agility builds because it will make you move and swing faster, which could be harder to utilize effeciently with low FPS.
If you want a standard melee build I would go for something like 21/21, 21/18 or 18/21. Max power strike, max atheltics, max weapon mastery. Put remainder of points into IF, shield or even riding. depending on what you want to do.
You might even want to go more strength... 24/15 or even 27/12 are still pretty decent. They will be much easier to control just make sure you don't get kited. And they will also be more forgiving builds as you will have more HP and can take a few extra hits.