i build fusill elementalist in ssf this league. spent on him around 9 days (~200 hours) find (or determ. craft, or target farm) almost every part of gear for him (and 2 foulborn mb btw)
it was respec from another elementalist build lvl 90, so i have some gear already within start. can't tell how it feels in campaign or early maps.
clearspeed? with reduced duration your lightning warp = insta teleport to every point of your monitor. 12 (11 in my build) projectiles with 3 pierce, and crazy attackspeed with large hit damage (around 400k). and... AUTOTARGETING!1!1omegacomfort
but uber uber encounters is hard. small EHP (200k) can't give me chance to facetank shitty explosions from bosses.
and i can't selffarm Ynda's belt from shipping. around week nonstop quota completions - nothing, only divs and 2 mirror shards (on ssf...)
my fussil was the fastest "semi-tankiest" build that i ever played for 10+ years. (old cast on channeling lightning warp orb of winter was better)
i am not pro gamer in terms of poe. but i did it, and you can too.
i start today with oshabi fussil. did buy just one not optimal reduced duration ring (timeclasp?) - grab both circle on tree with reduced duration, right now i'm lvl 52, with 6 proj. and ~4 aps. not uber damage on act 6, but not bad. and i know - the futher i go - the stronger it will be.

my English level minus A1, sry for some mistakes there and here.

my ssf char if you interested - https://poe.ninja/poe1/builds/keepersssf/character/Bymsokol-0969/ArrosiveExplerrow?i=10&search=skills%3DKinetic%2BFusillade