So I decided to learn Zbrush and this is my first character 
I have a question on the retopo.
Should I do the beard and hair seperate, or just retopologise everything in one go?
I’m a bit confused an what’s better for a Game Character.
Also the front horn, should I do it seperate or not? Same goes for the tail and what not.
I’m really new to character modelling so I have no clue 
Thanks in advance!
EDIT: Actually this is an older screenhot, the character has kind of a ponytail hairpiece