Found a fix here at InsanelyMac (thx @lubeats) for loss of DVI 2nd screen; patch of AppleGraphicsDevicePolicy kext (a bypass for some checks, details elude me now, it was a quick read).
Find: BA05000000
Replace by: BA00000000
With this patch in place, I recovered DVI output off my docking station in Sierra 10.12.6 and High sierra 10.13.6.
Actually, I found that voodoohda had an issue with my internal mic. I followed Bronxteck's advice and cleared up unnecessary kexts and leave only vanillaHDA in S/L/E and place latest ALC+Lilu in efi/clover/kexts/other . After restarting, audio worked as expected and there was no issue with my internal mic.
Thanks for the reply, but I've succesfully downgraded to 10.12.2 and I've got everything working, I'll post my files for who needs a thinkpad fully working in 10.12.x Everything is working, also sleep is working. Hackintosh files.zip