Thank you for this detailed guide. I really liked the concept of it and was really hyped to try it out as a season starter.
However I am sad to say I had a bad time with this play style. Since I have no grounds for comparison between pre and post-nerf Windowmaker, I can't quite put my finger on whether it was the seemingly low overall damage or just the clunky skill mechanic that put me off. Compared to the totem/summon necro I meddled around with in the last couple of days of last season, I dare say I had a breeze playing the latter, but not so much or as a matter of fact at all with this new toon.
Hopefully Widowmaker is not dead post-nerf since there are clearly people who like the play style. I honestly think it is quite cool as a concept, but in my experience found it lacking in performance simply due to Diablo II being a nearly two-decades-old game with limited capabilities to accommodate such a play style. Quite possibly even more so with the fresh nerf.
Cheers to the OP and thanks for the read!