Flurry would be fine since you add your normal BaB as well (a Monk 1/Fighter 19 would have a BaB of 20 while Flurrying) but that's not the main point here.
+27/+27/+27/+22/+22/+17/+17 is terrible at level 20 (which is the only time you could get that many attacks).
It's especially horrible because you have no way to overcome DR above DR/Magic.
The average AC of a CR 20 enemy is around 36 (at the low end). You need a 9 to hit on your best attacks, and are probably dealing anywhere from 5-15 less damage on each hit than you should be because DR Silver, Cold Iron, Alignment, and Adamantine (or Fast Healing or Regeneration) are almost universal across enemies of that CR or above.
The only monsters in the Bestiary at CR 20 without them are Dragons (who have DR/Magic instead).
That's also ignoring the hilarity of trying to use Trip of all things at that level, especially with a 3/4 BaB character. Everything either flies, is gigantic and hard to affect with Combat Maneuvers, or both. That AC 36 often turns into a CMD 50+.
That's against a CR 20 creature, something you should be able to easily handle as a level 20 character.
And the problems he faces actually SURVIVING to level 20 are the main issue here.
All of this ignores the other, non to-hit/damage related issues of the Rogue, like saves. Fort and Will as weak saves is a death sentence when everyone and their grandma (especially their grandma) at higher levels has a Save or Suck of some kind based on those two saves.
Give me the whole build and I'll see if I can try to fix it to some semblance of workability, at a level other than 20. Assuming it's not just a generic Trip build with Rogue instead of another class.
Avoron wrote:
Sorry, miscalculated attacks. +25 is highest attack bonus. But still.
Hoo boy, that's even better.