24 Sep 2007 at 22:43 - 4
There really aren't any, the rest of the bar is entirely optional. That's why a worthless pet can fit in there without doing too much damage.Take some channeling direct damage spells, restoration heals, channeling spirits, ranger interrupts or spirits, it really doesn't matter much. Splinter + barrage is a pretty useful combo that you can spend most of your time on.
I wouldn't recommend splintering a pet, as they have fairly slow attack speed. If you're going with the "splinter something else" idea, you might as well just splinter the physicals on your team and bring more utility.
As a final note, pets are nearly worthless on almost any class except a primary ranger, as beastmastery skills tend to be too expensive to use well. I would strongly consider making a ranger if you feel the need to have a pet, otherwise it will be a mobile skill disabler that takes up two slots.