I'm playing as a healer on AA:U, and was wondering wheather to go Hiram or Lib gear. I've compared both sets (T4 vs T2) and it looks like hiram gives you about 2,5k resilence and 300 more toughness. Healing power seems almost equal if you take 2nd set buff from lib gear into consideration.

Is there any reason for going library gear in 6.0? Is the -0.5 sec cast time and more hp worth it?
Here's my sets I compared:
Hiram T4
Lib T2