Ninja Tank said:
wish you could attach a laser to the bird's head
You can give it shock damage with an elemental artifact, which is almost as good.
As far as the abilities for people who don't have it:
Brick: Goes berserk with a big heal/regen, can kill 5+ enemies easily if they are grouped up and around his level. Berserk lasts longer then Lilith's phasewalk (I forget exactly how long), and with elemental artifacts you can punch fire and lightning while doing it.
Mordecai: Can power up his bird to one shot most things, and kill around 3-6 depending on their health.
Lilith: Can phasewalk either for a single big ambush hit (that some people are saying is currently broken) or use it to break line of site/heal up/get better sniper position.
Roland: Drops a turret that can kill maybe 2 enemies, probably closer to 4 powered up. Not so much due to damage, but the fairly short default duration and the longest default cooldown (100 seconds). With the ability to regenerate some health and ammo with the right spec. From what I've heard it serves more as a distraction for the enemies and portable cover later on. His real fun stuff seems to come more from talents and group bonus class mods.
They're all decent, and I've been playing Lilith mostly myself, but the bird is probably closer to the top as far as killing enemies goes (at 36 seconds it has the fastest default cooldown I think), with Roland and Lilith being a bit more tactical in use.