well, if you're in unified space you should still be able to offset your mesh either -50 or +50. Work the mesh on the left side only, don't sculpt past the red plane. When you're happy with it duplicate and offset it +50 and work on the right side. Does that make sense?
You would be surprised. It's almost a 50/50 ratio between male and female artists in some Asian countries. Which is a HELL of a lot better than in the US.
First, use imgur to upload images ^^ Second, try going half and half: give 50% of the weighting to the head joint and the other 50% to the ponytail bones as usual.
its quite hard to follow what's going on in the video to be honest i dont think you have much choice but to chuck some breakpoints in the BPs and identify which test is failing - it's probably a lot easier when there aren't 50 NPCs trying to do it all at once
It looks like the verteces that stick out are influenced by a bone on the other leg. You have to select those verteces and make them 100% influenced by the correct bone(s) on the correct leg. In this case, it looks like they should be about 50/50 influenced by the thigh and shin bones :) Let me know how it goes!