/QFT
eles have 100% fort, and are vulnerable to elemental strikes.... theres nothing a monk is better at.
Rogues dps comes mostly from sneak attacks, when they dont have agro... theres nothing a rogue is worse at.
Whether or not the rogue/monk can solo the ele is besides the point
Even if the rogue can solo it, he/she would be better suited for anything else.
Even if the monk cant even touch the ele, he wont likely be able to do much to anything else.