These were a pain to test because i suck at doing things like this.
Pros: the airdash j.a from j.2d rapid can be made gapless on regular block with good timing ( i suck at it though)
Great screen carry on block ( even better on hit)
Good damage and heat gain on low and throw mixups
The range on j.2d makes it pretty easy to setup compared to 5c rc mixup
Cons: Damage and heat gain is PATHETIC on the overheads unless you blow 100 meter and OD.
No gapless way into j.2d adds a risk to even trying the mixup
Can be abit execution heavy to keep the overheads gapless
Instant blocking j.2d makes this mixup fall apart. Nothing but j.2d RC straight into 5a is safe on IB.