As to the stalker thing, i mentioned that since they do the 2nd best of melee ATs after TW/bios on the pylon. So far though its not even close in real play while leveling, ST the stalker was much better. Also the stalker was my most recent project before this.
I think my STJ scrapper may have been better ST too, or at least felt faster. But its been a lot longer since I leveled that one up (june) so its less fresh. Regardless its probably related to the IO solvable issues, STJ is less end hungry and recharge needy.
I suspect once i get hasten and 5x lotg, and more recovery, the TW ST will go way up. Since its bursty right now.