Someone rang the lemon yellow galka bell! I originally posted this question when Aurum came out and I realized with my v-fork I could maintain a 6-hit with a 3% delay reduction.
I'm at work, but yes, Sword Strap came ahead in my limited parsing. Pretty much what people are saying though, I took the testing with a grain of salt.
Basically sword is always going to win because you're not only getting better melee damage, but also increased weapon skill frequency. If you’re going on melee damage alone it’s a wash, but being able to WS more frequently will put sword ahead every time.
The real kicker (besides needing 2 pretty difficult-to-obtain pieces) is that you have to assume that Aurum is the best thing to jump in and the best thing to WS in. If you remove Aurum for melee jumps or WS's you're going to remove your 'true 6-hit'. If you're using a pole strap, you can swap out the body and still maintain a 6-hit with the extra TP you get from your other melee attacks on aurum (you have a ‘buffer’).
Since the parsing is so close I think you can really sway this whole thing either way.
I know I get better Jump numbers using Zahaks (higher vitality and crits, although this is highly dependent on attack), and I prefer Zahaks for WS's in high-attack situations too. But if I use Zahaks I negate the benefits of the pole/valk/aurum build with each jump.
Basically, use whichever you want, the difference is going to be small. Aurum/Sword/Valk is sweet if you're happy jumping / WSing in Aurum (which I do on /sam, just to feel special

, and 99% of the time it SHOULD be better), but if you want to use other equipment in swaps use pole. You really have to stick to it if you plan on using it.