I can't say which DSDT patches you need, I would need to have your laptop in hands to test. Read the description of each patch and you should figure out if you need it or not.
Try to remove Intel HD kexts (AppleIntelHD* and AppleIntelSNB*) and you should be able to reach desktop, then you think about tweaking video drivers.
About multishit I have no idea, never did it, never will. Ask at tonycrap forum.