I was thinking of something like that too, but first I want to understand why there is this problem with intel because is absurd to me that I cannot run something like plasma (that is heavy but not so much) on the integrated card.
I doesn’t have problem with software, or at least the major issue is the DE itself. If i run something through the nvidia card it worl correctly.
Here the output of optirun inxi -SMGxxxz
System: Host: bering Kernel: 4.19.6-1-MANJARO x86_64 bits: 64 compiler: gcc v: 8.2.1 Desktop: KDE Plasma 5.14.4 tk: Qt 5.11.2 wm: kwin_x11 dm: GDM 3.30.2, LightDM 1.28.0, SDDM Distro: Manjaro Linux Machine: Type: Laptop System: Dell product: Inspiron 7577 v: N/A serial: <filter> Chassis: type: 10 serial: <filter> Mobo: Dell model: 0J8HMF v: A00 serial: <filter> UEFI: Dell v: 1.6.1 date: 08/16/2018 Graphics: Device-1: Intel vendor: Dell driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:591b Device-2: NVIDIA GP106M [GeForce GTX 1060 Mobile] vendor: Dell driver: nvidia v: 415.18 bus ID: 01:00.0 chip ID: 10de:1c20 Display: x11 server: X.org 1.20.3 driver: intel compositor: kwin_x11 resolution: <xdpyinfo missing> OpenGL: renderer: GeForce GTX 1060 with Max-Q Design/PCIe/SSE2 v: 4.6.0 NVIDIA 415.18 direct render: Yes