I like to run the provo masteries with my pets
inspire will raise damage by up to 40% ,sdi up to 15% ,and hci 15%
this is for pets yourself and for your friend so any spells cast are raised 15%
hci is raised for any physical attacks
di also
invigorate
Party Hit Points increased by up to 20, Party healed for 7-16 dmg every 4 seconds.
(Provocation Based). Party Strength, Dex, Int, Increased by Up to 8.
so both of these can help your whole party but keep in mind this is up to max so if you or friends/pets are at max hci for example then no benifit
so i disco and run one or both provo masteries
my next choice is usually peace masteries
Poison resistance increase(not the stat), Mortal, Bleed, Curse effect Durations decreased,
Hp regen bonus 2-22, mana regen bonus 2-22, stamina regen bonus 2-22.
Party Defense Chance increased by up to 30%, Damage reduced by up to 16%. Casting focus bonus 1-30%.
now disco masteries can help if you can keep them up adding a lot to the damage being done