Off the top of my head, there's Lattice and Wrap deformers, With lattices, you can use the Deformer set editor to add/remove additional objects as you go. Wrap deformers can be a bit messy in general, but you can use them like a custom shaped lattice and can give great results depending on the scenario. I don't think you…
Has anybody had success shrink wrapping something like a base head mesh to their high poly sculpt? I imagine a lot of tweaking points would be involved, but maybe that would still save a lot of time?