Well, those were all single-hits because they were SA'd. In reality Savage Blade is 2 hits single wielding or 3 hits dual wielding + additional attacks. Best bang for your buck is actually 2000 TP (10.25 fTP), but even that waypoint is questionably better than 1.0:
4 + 2 (DW) + 2*X (2*Multi-attack rate) = fTP per 1000 TP at 1000 TP
(10.25 + 2 (DW) + 2*X (2*Multi-attack rate))/2 = fTP per 1000 TP at 2000 TP
6 + 2*X = 6.125 + X
X = 0.125

So if you are Dual Wielding and have some combination of DA, TA, and QA that gets you at least an extra 0.125 swings per hand, you are better off WSing at 1000 TP than 2000 TP. Also, Moonshade Earring will skew this even further towards 1000TP, as you can see below.



Rudra's is even more heavily weighted towards the 2000 TP anchorpoint:
6 + 1 (DW) + 2*X (2*Multi-attack rate) = fTP per 1000 TP at 1000 TP
(15 + 1 (DW) + 2*X (2*Multi-attack rate))/2 = fTP per 1000 TP at 2000 TP

7 + 2*X = 8 + X
X = 100%
So you would need +100% Multi-attack to make it better to WS at 1000 TP than 2000 TP. Also, this is assuming equal weighting between the hits which is only true for unstacked Rudra's. Stacked Rudra's will even more lopsidedly favor 2000 TP.

The story changes with Moonshade factored in:
8.25 + 1 (DW) + 2*X (2*Multi-attack rate) = fTP per 1000 TP at 1000 TP with Moonshade
(15 + 1 (DW) + 2*X (2*Multi-attack rate))/1.75 = fTP per 1000 TP at 1750 TP with Moonshade

9.25 + 2*X = 16/1.75 + 2*X/1.75
6*X/7 = -12.5%
Because Moonshade offers such a significant fTP boost at 1000 TP, it shifts the balance greatly in favor of WSing sooner.



It should be noted that the above analysis ignores the time that it takes to WS. If you WS less frequently, you are subject to less WS delay. When I just plug everything in to the spreadsheet, I get optimal net DPS at 1606 TP (Dancer vs. Tojil) with Moonshade and Terpsichore AM3.
1000 TP = 1807.9
1606 TP = 1895.4
1750 TP = 1864.5
There is only a 5% DPS difference between 1000 and 1606 TP, however, while previously the difference would have been massive. These WSs made our jobs easier to play, and lazy DDs won't be as heavily penalized as previously.