I would go for the Ki-61-Ib as well, I would rather see the two 12.7 and two MG 151's though. This Ki-61 varient would be easy to build and actualy is a better preformer than the Early Ki-44's it even out climbed them, and with the cannons has a better gun package.
I do agree though the the Ki-84 should be the Next New Plane for Japan.
My Short term Wishlist for Japanese planes is:
Judy
Ki-61-Ib
Ki-84
A6M3
The Short term list is inteneded to give the most bang for the buck and make it easer for HTC to do, hince the two varients, both of which would realy help in the CT and in events to adress playbalance issue so common to PAC set ups. The Judy fills the mid to late war atack/dive bomber nich nicely and it's abaility to cary a 500KG bomb for short flights will help again adress playbalance issues. The Ki-84 is simply a must for the MA and will defentaly help in late war PAC set ups for the CT and events.
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Long Term would add the :
Betty, Nell, or Ki-21 (any one would do)
Emily
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Eveunatialy:
P1Y1
Ki-44
Grace
Jack
Ect....
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Some Figures from my Francillion:
Ki-61-Ib: 5m 31 sec. to 5,000M, 368 MPH @ 15,945 ft.
Ki-61-1 KAIc: 7 min to 5,000M, 366 MPH @ 13,980 ft
Ki-61-II KAIa: 6 min to 5,000M, 379 MPH @ 19,685 ft
Ki-100-I: 6min to 5,000M, 360 MPH @ 19,685 ft
You all notice we have the worst preforming Ki-61 in AH presently.