I disagree with some of the colours assigned to certain features, as you may expect, opinions being what they are. And with inquisitive coder standing up for the way of four elements this guide/thread really covers the class.
I'm stating a new adventure and character this week and I am heavily turning toward monk. A Tabaxi Monk to be honest, probably open hand. I just see a cat monk to have a lot of potential to have a fun RP element! Like an ADHD character that just jumps and punchs and kicks his way into a fight!
So I've got a question, I'm wanting to make a monk/barbarian build and looking at the RAW what I read is that to add rage damage you must use strength for your attacks but looking at the martial arts feature, the only stipulations for using the martial arts feature is that you must be wearing no armor, using no shield, using only unarmed attacks or monk weapons, but not that you have to use dexterity for you weapon attacks. So could I use strength to make my attacks and still use martial arts?
You've made a mistake with kensei's 'sharpen the blade'. It specifically points out it doesn't stack with a magic weapon that already has a bonus to attack an damage.
What would be interesting, is if it stacks with a defender weapon that has had all it's bonuses reduced to count as +AC. So technically while it's adding a bonus to AC, it wouldn't have a bonus to attack or damage. A defender rapier (finesse) combined with the defensive duelist feat could add a hefty situational bonus to AC. Let's say +3 to AC, +3 for defensive duelist (based on a mid-level proficiency bonus of a character) and +2 for the kensei agile parry. You could ramp up your AC by +8. An expensive combo, but effectively. Requires more investment than a wizard simply casting shield for +5, but likely worth the effort.
This means that Savage Attacker does allow a reroll of the damage. DON'T TAKE SAVAGE ATTACKER. The expected bonus scales with the size of the die, and can only be used once per turn. Monks use small dice many times per turn; SA is for people who use large dice a few times per turn. I would rate SA red, if it even rated a mention.
You say Open Hand Monks should use Open Hand Technique to knock their opponents prone "first". Open Hand Technique applies to attacks granted by your Flurry of Blows. Flurry of Blows can only be activated "immediately after you take the Attack action". So OHT can't be used on the first attack. Best case scenario, you use it on the second-to-last attack on your turn. You would then gain advantage on one attack. It doesn't cost ki, so it's ok. If you have allies who can melee the target before it stands up, knocking it prone is great.