Hello.
I thought about making a mesmer in an elegant black suit. Unfortunately, I do not know how to combine armors that gave the most desired effect.
So perhaps I could ask for some suggestions?
There are so many combinations that would work.
In terms of a jacket, take a look at: Tyrian, Elite Enchanter, Deldrimor and possibly Norn.
After choosing the centerpiece for your armour you can simply flesh the rest of the armour around that.