Pure Action Tank
APcd 'Balance' Johanna
Straight AP Sustain Johanna
ADTank Control Johanna
Tank me now!
Regen Tank
Mercing Johanna?
Crack Johanna
Pure Active tank Johanna might be pretty strong, pretty much every talent you get it is a reactive type talent.
I think the APcd Balanced build might be the best Johanna build. It has fast cooldowns, some cc, slow, Survivability, it kinda has a little of everything.
The AP sustain build is basically grabbing everything that will increase damage, though it does need allies help to deal damage.
The ADT is a tank that is focused on being a counter to auto attack damage with some control, so basically a Illidan killer.
Tank Me Now is a passive tank, you don't get any extra buttons, no real special effects on your moves, you are just a hard bitch to kill.
Regen tank focuses on hp regen. Grab orbs, have more regen, have an ability to heal you, have an passive talent so that you can use your heal more often. With Battle Momentum you have more damage, but the heal might not be worth it?
Merc Johanna might work?
The Crack build is basically a Crusader on crack. All speed talents, fun build.