Gah, my earlier post got eaten by the 'moderator' monster! (nuffin naughty, happens to me when I post pics on stratics for some reason)
Take what I say with a pinch of salt, I am clueless to how these things work. Your more after 'summoned' pets right?
Ok, I am... 115 music, 118 peace. I summoned a Earth Ele, mindblasted him twice for a total of 50 damage. Cast... Resilience. It has an upkeep of 5, health regen of 6?. The earth ele took 40 secounds to heal back up.
I then did same again, 2 mindblasts, about 50 damage on a summoned earth ele, 3 minutes later it wasn't quite fully healed.
Pretty conclusive, on Earth Eles at least, bard mastery spells effect summons.
If you want to test it any more I am on Europa, gimme a shout.