use the OH first, to Freeze the enemy first. then use the MH with Crushing Blow/Crushing Flames. if the Crushing flames kills the enemy while it is Frozen, the enemy will explode for the extra damage from the Frozen Set based on the damage that killed it from Crushing Flames. if you have Frostbitten, that will increase the damage Frozen does, and if you have Blistering, that is extra Bleed damage from the Immolation that causes Crushing Flames. lots of damage potential there, even without Blistering. could just go with extra Frostbitten for lots of extra damage without the need for Bleed from Blistering.