Okay, I'll admit it: I'm stumped. How in the world do you beat this mission in HM with heroes/henchies? My storage is overflowing with runes and insignias from all the different party builds I've tried (I play as a Monk primary).
My problem areas are 1.) The first boss, particularly the two Wardens of Earth who wipe me out with Churning Earth, 2.) The bottom of the stairs in the collapsing cathedral (I've been taking the center route to cut off time) where the Stone Rain pop up, and the biggie 3.) At the end with the Stone Judge and his party. By the time I reach the Stone Judge - if I reach the Stone Judge - my party is softened up from DP and he makes quick work of us.
I've been knocking my head up against this mission for a week and it's driving me crazy. I've never had trouble like this on a mission before! If anyone has any tips for beating this in HM I would greatly appreciate it.
Arborstone HM
Dragou Du Porzan
bungusmaximus
Curses necro for the stone boss works really well, machine gun onis dont like that either. Just bring good anti melee, the melee all over the mission is pretty mean (dredges, hammer guys, oni's). For casters glyph of concentration is really nice for that annoying ceiling that keeps dropping on you. For the wardens you might want to bring maelstrom, a water spell which prevents them to cast spells. If henchies stand in AoE flag them out ASAP, they wont run out by themself 
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iriyabran
take a warder 
bonder is good too
bonder is good too
electrofish
Warder definately.
I took stability, melee and ward against foes
The stability ward's particularly nice, cuz at the last bit you can pretty much ignore all the mobs and just cast stability where Danika tries to open door, she won't get interrupted and the mission will finish once the door is opened.
I took stability, melee and ward against foes
The stability ward's particularly nice, cuz at the last bit you can pretty much ignore all the mobs and just cast stability where Danika tries to open door, she won't get interrupted and the mission will finish once the door is opened.