If anything Bo as a whole is the mixup character of this game. I'm not sure what you mean by the two overhead/low mixups with bartitsu. Bo universally has his 244 string which is high, low, low which can be cancelled from any point in the string into the flips which are overhead. You can do 2 into flips, 24 into flips or 244 into flips and your opponent has to guess three times effectively. If you use this in the corner with ex dd4 then it's a true vortex, as the stomp jails into the standing 2 and then it's guessing time! You don't get too much damage for it though depending on whether you go for zero, one or two lows before the monkey flips but it can do some serious work to close out a game. Oh yeah and you can also confirm into db1 in Dragon Breath as part of the corner vortex.
Bartitsu is primarily good for footsies and you have to take into account that he loses his 8 frame f1 which is seriously good, plus he is super meter dependent for damage. Ground fire is for use in the corner when you are doing your corner vortex with ex dd4. ex fire spit is mostly used for damage midscreen from hitconfirms. Drunken Master is good against zoners because he can use the invincibility frames from the rolls out of meditation stance to get in past projectiles.