There is no need for that Healer, I promise you.
Buffs are also up to your own pref/style.

At 69 you can Tame exotic pets that drop off 2x buff each.
Until then, I personally say you cant get wrong with
Versatility - The Boar is ONE of the pets that provides this stat ++ to over all dmg healing and dmg absorb 3% I believe
Stats - Dog is also ONE of the pets with this stat ++ 5% to stats aka more attack power/crit
Crit - Wolf/Raptor offer up the CRIT buff of 5% [Pet crits return focus to you = more focus cost moves ++ dmg]
Those are my 3 that I tend to prioritize

After that
Haste - Spore bat
Multishot - Dragonhawk
Stamina - Bear

After I get this far into my reply I recall this link.
http://www.arenajunkies.com/topic/25...pet-guide-wod/
Nice like quick reference for buffs and pets to help you assemble your army!