Ok so I'm thinking of making a monk. Now I think this is how it's going to work. First, I'll get ascended. Then, I get to level 20 (or other way around). Next, I will change my secondary from Mesmer to Warrior. After that I will redistribute my points and get some warrior skills, and GO!
Ok so, I'm wondering

if i should
A: start out with mesmer as secondary
or
B: Start out with warrior as my secondary
Also what are the advantages of mesmer as your secondary?
edit: i have a level 16 monk and not once have i used a mesmer spell except if im bored...and feel like trying to do damage