Sterling Vermin presents 2 new feats to bring martial arts to the masses!

[sterling vermin]

Punch, kick, it’s all in the mind - well, feats, actually! Today at the Sterling Vermin Adventuring Co. we are expanding the role of unarmed combat again with two feats that introduce a variety of martial arts styles for use in your D&D 5e campaign. Whether you want to dart about harassing your foes as a Wasp Style practitioner or go all out assault with Tiger Style, these feats let you master multiple forms of martial arts and even eventually master teaching them to others!

Everybody was kung fu fighting! (https://sterlingvermin.com/2016/05/11/martial-artist-sifu-feats/)

[Amnoriath]

Overall, very nicely done and provides a nice synergistic feat chain though I do have a few concerns.
1. Taking the two feats in order to qualify for Sifu has diminishing returns considering that you have two use a bonus action to gain any one of their stances. Normally feats are just given and therefore just passively stack. I would suggest that maybe when they would be taken as a feat themselves that they would get a relevant stat bump. While I do understand your damage die increases it still seems to be behind weapon combos overall.
2. The concern above could also apply to Sifu.
3. While the teaching part of Sifu is definitely interesting giving up an attunement slot seems like it would never be used other than in low item high level play.
4. Revenant's Red Hunger has abuse to fully replenish hit points, maybe temporary hp instead while making it a little more since it has fairly high requirements.
5. Drunken Master Style is either redundant or allows two attacks with a Dodge action. Considering it could be taken right away or at least level 4 this is too strong at this point or even at high levels. At the very least it needs to be diversified a bit.

[Amechra]

Drunken Master Style/Monkey Style is excessively good.

Mainly because you're absolutely snapping the action economy over your knee.

[Amnoriath]

Aside from the style fixes perhaps since this is a feat chain lets make Sifu a little more significant. If people are going to take this twice it is likely because they want to complete it so given it doesn't give any points back how about as long as throw in a level requirement such as at least 12(variant humans can could hard ball using a fighter at level 8) that they get add 1 to all ability checks they make to represent the various and mixing of such styles? It may seem much in strict numbers but all stats add other places and you are giving up 8 stat points to do so.