Non-rigged animation to Unreal 4

Any tips or best practices to export animation that doesn’t require rigs (basic meshes with PSR animation) to UE4? So far .abc seems to work ok (had some origin/pivot point issues with .fbx) but I was wondering if there is a better workflow for this.

Also, how would I export animation on non-standard properties (example : animating the start/end of a bevel along a spline?). I guess there should be some way to bake it down but Í’m having trouble getting it to work.