wrong report, sorry dude but u asking for the bug that was before they fixed this spell, now works properly copying the 100% of the pal heals during 15s.
Atm guardian copies pala heals by 100% but when pal enter in battle fatigue, the guardian copy the already reduced heals form the pal, so its working fine.
You asking for the bug that was affecting guardian before they fixed it, which was 120% heal reduction, 60% from the direct pala heals and 60% extra for the copied heals, wich shouldn't.
Check out this:
http://forum.pandawow.ru/showthread.php?t=200883
http://forum.pandawow.ru/showthread.php?t=178236&highlight=guardian
http://forum.pandawow.ru/showthread.php?t=178236&page=2&p=1106357&viewfull=1#post1106357 (Neff found some proffs with a video in this post)