Good choice, the Hound Master and the Hellion really shine in the Weald!
High protection and blight resistance are no real issue for them, and the Hellion’s Adrenaline Rush is really nice to get rid of the nasty bleed and blight effects. It looks like you use Barbaric YAMP! instead, but I don’t really like this ability, maybe because I never stall fights at the end for healing.

I usually team them with Bounty Hunter (instead of Man-at-Arms) and Arbalest (instead of Vestal), the first one for its effectiveness against Humans and high protection enemies, and the second one to deal with the couple high dodge enemies and a bit of extra healing, mostly by boosting the Hellion’s and Hound Master’s self heals.

For the Hound Master, I take Lick Wounds instead of Cry Havoc, relying on the Hellion and Arbalest to kill the stress dealers before they can do too much damage to my heroes nerves…

I think you might enjoy giving a try to my twist on the Hunting Hounds of Hell team, it’s not so much harder to keep alive despite the lack of a true dedicated healer, and it deals a lot of damage very quick. A dead enemy can not hurt you ;)