Big investment for little gain is how I see it.
I'm already making Body/Hands for War on same character so I might as well go extra step and make legs but yes I agree. Though BIS will always be BIS
I rarely use TK unless I have full buffs/FW so maybe my set is off. I am showing in my set same as yours besides:
Anchorite +3 feet
Hizamaru +2 Legs
Anchorite +3 Hands
I guess you ae going more for TA procs and mine is just normal WSD.
I only use Tornado Kick when Footwork is up and yes AF feet +3 get swapped in the above set (it was just for howling fist). Since ftp replicates on all hits the damage is really nuts when you get a triple attack proc on 2k+ TP (using godhands and moonshade) and with Footwork + AF+3 feet bonus it's really nice. It being a 3 hit WS too give it an extra hit chance at TA proc vs Howling Fist 2 hit chance.
When I factor in the above, I personally value triple attack over WSD due to WSD only affecting first hit of WS. Only reason I don't use Adhemar bonnet over relic+3 head is because you lose a lot of WS main stat mod (str/vit).
Also for easy solo 4 step I do Tornado Kick > Shijin x 3.
Though I don't have Vere yet and only R15 Godhands so maybe me using Tornado Kick is subject to change when I get my Vere for when Impetus is up (I use Impetus/Footwork at the same time really). I'm assuming with Vere you spam Victory Smite at 1k TP when impetus is up