Now that the Zaishen are giving the quest "time of heroes" you can run this build in HM and NM , it works 100%, there is a build in the PvX website but I tried a few times that build , even if the build is recommended , it doesn't work
So here it is , resurrecting a build from 2007

All you need :
-A Monk/Dervish character
-A weapon (one handed) with 20% enchantments
-The popular grim cesta -50 HP
-Armor set with sup. runes to have the 105 HP (+ the grim cesta = 55 HP)
-A smiting prayer head armor part with a sup. smiting prayers rune
-A divine favor head armor part with a sup. divine favor rune
Attributes:
-Smiting prayers 16
-Protectiob prayers 8
-Divine Favor 11
-Earth Prayers 9
Skills:
-Word of Censure [Elite]
-Spear of Light
-Protective Spirit
-"You Move Like a Dwarf" (Norn skill)
-Mystic Regeneration
-Balthazar's Spirit
-Essence Bond
-Blessed Aura
How it works:
-Make sure you have the Deldrimor Title track selected before entering the mission.
-When you start the mission , swap your smiting head armor for the divine favor head armor and cast Blessed Aura (so we have a 30% longer enchantments), then swap back to your smiting head armor (so you have 16 in smiting prayers)
-Cast the other 2 enchantments (Balth spirit and Essence)
-Go directly to the Great Destroyer but before entering the lava , cast prot. spirit + mystic regen. (very important you keep this two enchantments up all the time)
-When infront of the great destroyer spam Word of censure and Spear of Light
-The important part: Use the norn skill ("You Move Like a Dwarf") to interrupt the Great Destroyer Skill "Lava Wave" , if you don't you will fail ! if you dont interrupt his skill he can summon more destroyer (necro or ranger none of them are good for you !)
-Keep spamming Word of censure and Spear of Light and interrupting him when using his skill "Lava Wave" until he is dead.
Important notes:
-Don't interrupt other skills from the Great Destroyer, just interrupt his skill "Lava Wave"
-If a Necro Destroyer or a Ranger Destroyer spawn at the beginning resign and start the mission again.
Old video (exactly my old same build, vid is in spanish because I did it for my ex-guild but hey , gameplay is the same , sorry for the quality tho lol ) : http://www.youtube.com/watch?v=t1U_GQnzLgw