Strength is great, but the boost from the gear stats and enchants is all you need because at 1 strength equal to 2 attack power, you're throwing approximately 1600 strength value in (10) gems just to increase your attack power by 3200... and that 3200 attack power does not bypass resilience!
In the same amount of gems (10) you can stack 3200 PvP power, which is roughly an additional 14% damage increase to enemy players! Would you prefer adding 3200 attack power, a minuscule damage increase that gets dwarfed by armour and resilience, or an exceptional 14% damage increase to players regardless of their armour and resilience by using gems that diminishes the effects of their resilience?
At anything over 50.00% Power, it is hard to believe that any enemy will have more than 15.00% - 20.00% resilience left over against your attacks: That sounds more comforting than 3200 attack power glancing off of a remaining 29.00% - 34.00% remaining resilience, doesn't it?
These are just my own personal strategies through experimenting since my return last week to the game, I'm just exploring the edges and I hope that this helps others decide in where to place their gem loyalty.
I would personally suggest that hunter's and other's using agility try this, as for intellect users, I do not know, I am not a caster player by any means.