The answer is 'it depends' as usual. You can go for maximum DPS with a Ravager. You might prefer a carrion bird, owl or bat with the screech debuff to nerf the opposition's damage output. Scorpid poison can prevent the opposition's healers from cleansing their team. Wolves howl will buff your team's melee damage. Cat's prowl will give them a strong first attack.
So pick one. :p
Edited, Nov 29th 2007 5:12pm by ItsaGaAs