So Dominating Blow really blew for me

Well, it did decent until t14 and gear worth 5div, but is now a little clunky with getting the sentinels up...
It gets maps and bosses done, but really slowly.
now I wanna reroll into something else as a witch. Doesn't matter ascendancy
I don't wanna play any minionbuild tho, looking into something balanced(I guess everyone says this) between mapping and bossing.
Glass cannons is not my thing, I'd rather have it take a little longer to kill a boss than to have one mistake make me die.
I have about 17 divs to my name atm. and could probably do more by selling the DB gear.
Been looking into Winter Orb and Spark a little bit.
Does anyone have experience or know if my 17-20 divs is enough to make a build out of?
Pianoing skills and flasks is not an issue, it just makes it immersive.
Any help or suggestions of other builds appreciated
