Well conjs buff around 326 mitigation, crusaders by around 360 I believe. Conjs also buff resists by 806 to cold and 1008 to heat, power of group by 576. You could argue that conjs are better buffers then wardens atm... sigh. Still, they aren't healers and the point is balance between healing classes.
If they did give us an extra mitigation buff I'd be happy, but I don't believe they will. I'd be happy if they do though 