If I'm not using a Warrior or Rogue (Or haven't leveled high enough to get Arcane Warrior as a mage) I always enter the battle as dog and than switch back to my main. I try to get the last hit on ogres just to get the kill cinematic. It was actually thanks to him that I even managed to defeat the High Dragon the first time I fought against him. I didn't know ringing the gong summoned him so I only had Myself (A Spirit Healer Mage), Liliana (For opening locks), Sten (just cause) and Dog (Same reason as Sten). Sten went down first and me and Liliana tried to kite the High Dragon, but eventually it hit harder than I could heal and I was dead. Liliana and Dog carried the rest of the fight but eventually even Liliana was nailed by a critical fireball before she could drink her Poultice (What) and I though "Well, guess I better reload" and waited for Dog to die. He didn't. Barely dead, but somehow a lot of the Dragon's attacks missed him and eventually he bit the ankles off of him.