Monk 5/ranger 1 with nick, tavern brawler, 18 dex 14 strength. Daggers, hunters mark.
1d8+1d4+1d6+6 damage one focus point 5 attacks.
Nick without Two Weapon fighting style is no stat to damage.
Hunter's mark requires a bonus action. 4/day.
Monk 5 gives you d8 monk damage.
First turn. HM (bonus action)
Action (2 attacks 1 nick) for 1d8+4+1d8+4+1d8+3d6 (32)
Second turn. Action (2 attacks 1 nick) same as above. (32)
Bonus Action: Flurry (2 attacks) for 1d8+4+1d6 x2. (24)
3 turn damage is: 32*3+24*2=144, or 48 DPR.
20 strength fighter with GWM and GWF using a greatsword.
16 damage per swing, 32 damage per round, plus action surge and 40% chance of crit, is 140.8.
46.9 DPR.
So a brain-dead "I am a fighter swinging a big sword" is 1.1 DPR (2.3%) lower DPR, and exceeds it if there are multiple mooks to fight: exceed the above monk, you just need to drop a foe to 0 HP and get the bonus action attack (on a turn you didn't crit basically).
Ie, the build isn't OP compared to other less convoluted 2024 builds damage wise. How does it compare to 2014 high damage builds?
In 2014, a L 6 human BM XBE SS would do 52.5 DPR at -3 to hit. So 15% of swings that would be hit above instead miss. But we add in precision strike and use it when we miss by 4 or less (20% of swings) which more than makes up for the -3 to hit; with 4 superiority dice and a 20% chance to use them, this lasts for 20 attacks between short rests or almost 7 rounds (longer than the above Ki expenditure does).
Then we add action surge.
So 64 DPR using 2014 PHB. This is 33% more damage than the 2024 ranger/monk. Now, this is a high damage 2014 build, but the point of the thread was that 2024 was more OP than 2014?
This monk/ranger isn't OP compared to 2014 PHB. I mean, it might be better than a 2014 ranger, but that isn't the standard of OP.
I could also do simple 2014 GWM Barbarian which is in the same damage range and accuracy as that ranger/monk. (49.1 DPR; the -5 to hit very roughly cancels out with advantage. This includes a 40% chance of a crit leading to an extra attack).
How about a vanilla 2014 L 6 Gloomstalker with SS? 22 damage per shot, 52.8 DPR at net -3 to hit. Same damage range as your OP monk, and Ranger was considered a weak class to go 6 levels in.
Like, what am I missing? Why is this OP?
Wait, I think I forgot tavern bralwer damage reroll? So 1s get a reroll. 1d8 with goes from a 4.5 average to... 4.94, or +0.44 per d8. At 5d8 per round that is an extra 2.2 DPR; nearly rounding error.
Oh wait, are you having Tavern Brawler's 1d4 damage stacking with Monk unarmed strike damage? Laugh, ok.
That is why vague complains are a bit of a problem. You can't tell what the complaint is. It could be "I don't think a monk should deal damage near that of a fighter with a greatsword", or it could be "I have read the rules so that tavern brawler and monk unarmed attack stacks like in BG3, so each unarmed attack deals 1d8+1d4+strength+dexterity+1d6 damage". And all that is expressed is "L5 monk with dagger and L1 ranger with nick mastery". It could mean either claim, and nobody can tell, because the OP complaint is vague.
Yes, if you read tavern brawler as adding to monk damage, you can probably push the limits of OP. Might I suggest not misreading it that way?