tbh, finding the right export settings for any engine is usually pain in the ass.
thebiochemic17543dHad made rigs in Blender 2.79 for Unity5 back then. That was pretty painless actually, the only thing was the naming.
UE is still on my list though
@hasu well... maybe i'm weird but i saw nothing wrong with the solution of "do five trial and error exports+imports with different settings, find the one that works, note it down, never change it again" =D
... yeah, i definitely am weird, all the info needed for the importer to import correctly should be embedded in the file itself, now that i think about it...