Yeah it's really good. But most players who use it abuse it to a fault, making it easy to bait and punish.I'm actually finding the Parasoul Napalm Pillar assist to be the strongest so far. That thing is so good.
I can't find a single good assist for Ms. Fortune, I guess she should be played on point?
As for Ms Fortune, try st.MK as an assist. As a general rule of thumb, when a character seems to have specials that don't make good assists, you're probably overlooking a really good normal. Valentine's cr.MP is a perfect example of this. AA, long hitstun, and occasionally crosses up? Yes, please!