in your dreams scrub
monk is nothing near barb/paladin/fighter
my crit champion just rekt elder brain on hard mode in 1 turn and don't even used all 9 attacks cause 4 was crits and needed only 6 - so yeah monk is better in your dreams = can your monk do over 500 dmg in 6 attacks ?
I like how literally a page ago you quoted your warrior as doing 7-23 damage but now he’s supposedly magically doing 100 damage per attack on a crit. Provide a screen shot of your character’s inventory, showing what equipment he’s using, the damage per attack and the to hit bonus. It should be trivially easy to do.
And yes, Monk is better than Fighter 6 / Barb 6, in a variety of configurations including but not limited to Monk 8 / Barb 4. And if you think Monks are garbage before act 3 (hilarious btw), pick a point in the game and pick a level and we can just run the comparison again. As previously indicated the last one was deliberately quite generous to the Fighter, I can assure you at lower levels it turns out much worse for them.