What makes you think he will defeat them though?
The reason why I and Sentinel believe it take multiple points.
- Both Inu and Neko going directly into their strongest form while Jack beeing already damaged. At this point they only have now their Sulong.
-Jack has his Hybrid form left, with mean he possibly fight them back with Hybird
- the most think is that Oda want to show firsttime a zoan awakened power, if Jack can match them already in hybrid,im sure id he has awakened he gonna beat them, showcase how op someone became with zoan awakened power.
- Luffy want to take on Jack as revenge, he said he want kick Jack ass alongside with Kaido and right now both are above.
My theory is that Jack beat both Sulong Minks via awakening power for hype and then get block the path of the Scabbard to reach Kaido,Luffy join and take him out with also show Kaido to take Luffy seriously.
At this point I wouldn't be surprise if Jack actually beat both Sulong Minks.