Evan
[09] Warrior
44B+K is something I've been messing around with. Not a lot of people use it, for good reason. If they know how to step it, its pretty much nigh unusable 90% of the time. If they don't however, it guard breaks in SEVEN. Not to mention, on NH (the rare times it does hit on NH), it can combo up to 99 damage with no meter.
I've been messing around with 44BK too, and I've found it can be useful on wakeup. After getting 6B8 in the air, or 1K.
If they don't roll to the side, you'll at least hit them... if they get up guarding low, you'll get the launch. If they block it, you can block confirm the extension... so if they try to step it, they'll still likely get hit.