Best setting for iMac Pro ??

I'm a user of parallels desktop for more than10 years and till now all was ok.

End of December 2017 I bought an iMac Pro 10 cores 64GB Ram 16Gb VRam.

I installed Win10 pro Office 2016, BlueBeamRevu-kind of Adobe Acrobat Pro and what a disappointment,

My computer works like an 386, My first VM crashed and disappeared.

I did another VM 64Bit (the 1st was 32) but the performances are not acceptable.

I'm using Autodesk viewer to see the models(I'm a civil eng.), but with this VM and parallels 13Pro is not possible.

I have another iMac 27" with Parallels 12 installed on it and is working very well and I can use  the Autodesk viewer.

I have a problems with all other programs-Excel-as soon as open more than 10 spread sheets, the system slow down and even stops.

Yesterday I downloaded and installed a try version of Fusion 10 std edition.

I imported an existing VM from parallels desktop.During the import procedure I get an error message:

"U can't import in a hybrid open state or something like that. execute  cmd.exe shutdown  /s /t0 or continue". I continued.

IMO everything was ok once I installed the tools.

The good news is the Autodesk viewer works perfectly.

I configured the VM at my best knowledge: 4cores, 32GB Ram, 2GB VRam-this is the max possible.

The 3D accelerator is 9X and no way to make it 10X. Is - it normal.?

Sometimes when I open an Excel file I get a black screen for few seconds.

I have all the time  many open drawings-PDF format  and many excel sheets.

Could someone tell my what are the best settings for my hardware.

Please advice

Regards

Harry