No dsdt and ssdt seems to be fine for use with bios set to internal gfx.
Which smbios are you using?
Which ssdt tables have you in your ACPI patched folder?
Did you generate a ssdt.aml for your cpu with any kind of script?
I can tell you out of my experience with lenovo products, that it make no sence to switch optimus of with any kind of method in dsdt. To turn the switchable gfx off in bios is the correct method.
I have tried to switch Optimus off at an E330 with dsdt.aml. With this method only boot time got longer. Try to extract a dsdt.dsl with DSDT Editor and look, if there is any kind of peg device. If you have no such device in your dsdt.aml and no peg device is added during boot by bios, then your method to switch in bios to internal gfx is correct.
I have read in some posts, that clover has or had problems with wake, sleep restart. Perhaps clover infects your pstates in turbo region after sleep.
You have told in your post #3, that you have attached ACPI tables. But they are not there.