After playing the Guardian for at least 100 hours, I've come to the conclusion that there's only two types of builds you can run to be effective.
Meditation build: Great for 1v1, excellent self-heals and condition removal, terrible cc mitigation(no stability) and terrible for chasing down targets.
Shout build: Great for groups, excellent self-heals(if teammates are nearby), No condition removal, pretty good cc mitigation(Stand your ground), terrible condition removal and you can't chase down targets.
Over all, the Guardian is excellent for holding points but is at its worst if he/she's fighting a target that's kiting.(no cripples)
Also, after playing around with the tomes after the nerf, it's nearly impossible to get any big heals/damage off. It's almost as if they tomes are useless just like renewed focus.
Newbie realization, toughness does nothing for conditions. If anyone else has input or something i'm missing/wrong about, let me know.