I too would like to beg that Matru's hp be lowered at the least. Honestly, I don't mind chasing him around Underhill like a spaz, I even got him snared. But with 3 crit bow shots for 700 and numerous 200 point others, along with a bard spamming his 3k DD, we jointly got him down to 75%. At which point he despawned. We tried again later. Same thing. With Finster/Zarra also on him, he went down to 72%.
And this is totally ignoring the fact that Matru bugs happily through walls, swims at obscene speeds (my Clerics is 250 at swimming, couldn't catch him) and won't stop to fight no matter how many arrows I slam into his spinal column. I like the idea, but Mr. Fleetfoot is out of control. I could handle it if he were outside where we could use bardspeed or even just spirit of eagle to play catch up. But in Underhill, we're fucked.