Just make sure not to raise the "map" torque model side's "max map" value. Only do the airmass one. It should be the top one if they put it in the cal like all the others. Then set your dynamic settings to switchover at their factory settings. You can raise dynamic to prioritize VE if your VE is dialed in pretty much right, but the ecm will try to use MAF above 4000 rpms regardless.
Actually raising the map side is a good way to learn how the models are referenced for transmission operation. If you raise the map side one, it won't downshift when you floor it as the torque calc will be too high
On the reverse of that we raise the airmass one to read in those areas to get the correct line pressure and shift pressure request. The engine side will also use that reading for torque control in general and use it to limit ignition timing if it gets skewed too much.
Hopefully that's your main problem especially since adding more boost made it worse, but I still think you'll wind up having to adjust the transmission settings and DD more after correcting that.