I don't think you understand how frames work.You cannot get 3 fpa on long/broad sword, they are capped at 5 fpa.All attack speed after 219 is completely useless and doesn't increase attack frames any more.As soon as you hit your fhr and ias caps those stats become obsolete.You literally lose 40 % damage and even if you have 3 of those perfect jewels you described that would net you very small damage increase because of the 2 % str.LL and ML are not very good on wold because harbringer converts 75 % damage into cold.
You are right, I am not an expert. The speed index shown in the theory crafting section of this guide does show that a 4 fpa is achievable with a long sword with a wIAS of 125. I have since managed to craft a 10% IAS, 15% FHR, Indestructible jewel and added 3 IAS MOs and now have a 128% wIAS. My 4 fpa speed is now back. I had forgotten how the faster fpa goes through the mana so quickly though, lol, I have to charge up much more frequently with MP now, but am loving the speed. I was also wrong about my perfect jewel, it is a 45 AR not a 50.