In my current save on Fm19, I'm experimenting with an asymmetric 442. Things are looking great, as it's the first tactic I've created which creates space and..... Through balls to my striker!
Can't post screenshots right now, but the set up looks like this:
SKs
FBs CDd BPDd FBa
WMa CMd BBM WPs
Ta
AFa
Its early days for this tactic, but I'm really pleased with the football it produces.
If you're interested, I can post some screenshots in a day or two.