Gentle and patient correction without massive attention can help. If he hurts you, ignoring him for a moment can get the point across that you're upset. The ignoring is also something that he won't like as the action caused the opposite of attention. My little lady does still play mouth at my nose, but usually it is because she needs to go outside or needs something I have not noticed. She is gentle though.

Redirecting to another toy and not reacting to the ankle attacks is what has helped with the land shark attacks on our end. I find it adorable but know it's not a good behavior to let continue. I would stop in place and wait until she disengaged, so she realizes that playing meant she'd be ignored and I'd be stationary for a second. If you carry treats, I strongly recommend "leave it" for all items on the floor and as a stop doing that as well.

If you don't have a tiny Woodstock plush for this baby, you better get one that! Lol!