No I wont stop using it, but when I plan to render a series of images like now, it takes a lot of time. And yes, Octane requires Cuda which is running only with Nvidia cards.
As for your question my opinion is that SSS with IDL gives the better result. I have rendered the same image (my previous deviation) without SSS and IDL activated, with SSS and IDL deactivated, but the outcome was poor.
The first one looked flat, while the second had too dark shadows.
This one is more realistic.
The problem is that in any case I had to modify a bit the original mat poses (I have changed or removed ambient and translucent nodes in IDL for example).