Most definately! I have a tricked out widow who does insane damage (single target, especially!). The fear component is nasty, especially in PvP! A little extra defense (ie: they're feared = they're not attacking = defense!).
I only slot 5 of them, as 6 is useless to a widow, but YMMV. I dropped the dam/end/rech one, and put the rest in slash (6th slot is a Hecatomb chance for Negative).
I only have T3 hybrid (assault) and for even-con minions (lol) I easily top over 1,000 damage with slash. Which isn't bad for my main attack (up every 4.26 seconds)
"Look how many pages of crap are in this thread already!" -r0y to all threads on these forums.
So what does the SoA veterans think of the ATO proc (Dominion of Arachnos) after several weeks of playing with it live? Is it worth slotting?