For him I tend to use Frost res aura on my pally, helps a bit with healing. Holy Wrath does a number on the skellies, and you can cast Searing Pain on the Frost Tombs for fast cast, decent damage and low mana cost. If you really, really need to assist in taking down skellies, I'd suggest RoF on round robin or just seeding so you're not making matters worse for your healer.