Could Combine Synths survive on their own after the super portal closed?

After the portal closed and any Combine left on Earth had communications severed with the main empire, could the Combine Synths survive on their own?

By this question, I mean if Combine Synths would be able to survive in the wild without help, just like an animal would. Would they have any means to feed and drink, or would they die to starvation?

If they could, what niches do you think they’d take? Could we see Striders grazing on trees, Gunships fishing in the seas, and Hunters chasing down large game like wolves?

Hell, could some of the more intelligent synths (namely Striders and Advisors) eventually join human society peacefully, and coexist? What do you think?