What will be your primary class on Green?

[soronil]

Trying to whittle down my characters that I want to play. I am trying to pick 2 to focus on.
currently at Monk > Ranger > Mage.
The mage was really just to have a char that could solo camps, farm my other chars some drops / earn some plat (since monk has WR penalty), but I can't play all 3 of these characters from launch and I am really interested in ranger and monk.
Question:
How does the solo ability of a cured-silk-bare-fist Monk compare to a Mage from level 30-50? From a farming /camping rares perspective more than an exp perspective) In dungeon crawling mage has invis, monk has sneak/FD... so mage has easier time getting to camp but monk can split a camp. Outdoors less worried about because I can always fear or bow kite with the ranger