Just figured I'd type this up here, not that I imagine they will ever be implemented. I feel increasing monks damage won't really make them anymore of a popular choice because there really is nothing that makes monk stand out, aside from hand to hand type damage which is really nothing to boast about.
So I figured a few changes to some abilities that massively change monks playstyle....
Formless Strikes - Change the damage type of auto attacks to match that of Requisecat, they cannot be resisted by any means and break Caturae shields. In addition to that, while Formless strikes is active, monk weaponskills now magic burst but cannot skillchain. Make Formless strikes a 5 minute duration with a 3 minute cooldown. Impetus cannot be used while Formless Strikes is active. This will allow monk to fill a new role, similar to how scholars can create skillchains with magic, monks can magic burst with weaponskills.
Boost - Enhances the skillchain damage or magic burst damage of the next weaponskill or chi blast. This will allow Monks to hit big numbers.
Chi Blast - Can magic burst for acceptable damage. Halts the TP gain of the target for 30 seconds.
Impetus - 5 minute duration on a 3 minute cooldown. Cannot be used with counterstance or formless strikes. To be honest, monks damage isn't that bad when Impetus is up, but Impetus downtime is pretty bad considering its a ramp up skill.
Focus - Increases accuracy, magic accuracy and crit damage.
Counterstance - Remove the defense penalty and provide it with a 5% DT or 10% PDT. Provide TP on counter or enmity gain. This will allow monk to sudo-tank if necessary. Cannot be used with Impetus or Formless Strikes. Think of them like stances that overwrite each other.
Mantra - Have gear that increases its duration, to make it more of a useful ability that can last an entire fight.
Inner Strength - Increase its duration to 5-10 minutes to make it an actual useful SP ability.
I feel if you add these changes to monk, they will be far more desired without being OP. They can fit into more types of parties because of a unique thing only they can do, the ability to sub-tank if needed, and the constant up time of Impetus.