I just capped Enraged Lunge the other day and then went and played a mission using it and HOLY CRAP! The damage I was seeing was awesome. I ran 15 in Beastmastery and basically just spammed Enraged Lunge right after Beastial Pounce. I kept Call of Haste and Call of Protection up at all times too.
I was fighting mostly Afflicted monsters and the times I hit Enraged Lunge when other 3 BM skills were recharging I was seeing anywhere from -80 to -150 damage. I was probably averaging -100 and even tagged a Afflicted warrior for -186 damage from a fricking pet attack. That blew me away.
Now granted we did have a Paragon in the group who did help with the damage because I saw him using Anthem of Fury. I know I probably sound all stupid and giddy like a little schoolgirl, but I find it cool when I discover a new skill or build that I have fun with. (And no I don't mean discover as in being original - just mean that I just now found it)
Pretty cool to be able to do damage combos of around -150 (-50 and -100) every 5 seconds. And with Call of Protection up and 15 in BM this gives 20 base damage reduction (I think?) so he's a real tank. And Predator Pounce heals for +50 with every strike so I rarely have to hit Comfort Animal either.
I'm definitely gonna play around with this build some more.
Beast Mastery is much much improved on the originally released version, but even 2 years ago you could get some decent damage with them, so I'm not too suprised