Assuming best possible circumstances on Wiki, base stats are:
and best possible recorded augments are:
DMG+5
Delay-28%
ACC+10
That's a very rare augment and if you check the Oberon's Knuckles page for the screenshots on this site, you'll see that most of the augments don't even come close. That would mean that the completed weapon would read:
DMG+23
Delay:70
ACC+10
That would give a total of 58DMG and 370 delay, for a relative DPS of 9.4. Same thing with Destroyers, 53 DMG, 348 delay, for a relative DPS of 9.1. The difference, thus, would be about 4% over time, not counting added effects. So it comes down to the ACC+10 vs. Crit rate+6%.
Now, I may be mistaken but MNKs should be using pizza nowadays right? So ACC should be capped anyway?
I guess it depends on what you're doing but I'd take Destroyers most of the time because my ACC is capped more often than not.