Ravenheart Gloom Help

I am a panic mesmer, with my dervish friend. We got 2 monks, 2 SF ele with Maelstrom, 1 earth ele and 1 mm with aura of the lich. the problem is too many demons in the last few waves. The problem isn't too many demons. The problem is the armor level of DoA foes vs fire damage. I can't remember the exact calculations offhand but

For example: 60AR - 100DMG Searing Flames will do 100DMG but it will only do somewhere in the region of 45DMG and less to pretty much everything in DoA. Flesh Tormentor's have 120 AR ish vs elemental damage so SF vs one will be incredibly weak. Your damage is barely scratching the surface even in NM.

Weaken Armor(if you insist on armor sensitive damage),Mark of pain,Spiteful Spirit,Visions of regret,channelling lightning damage and inflicting cracked armor would all be better suggestions imo.

I've cleaned Gloom as primairy mes running a bit tackled discordway build + having my rit fiancee run SoS spiritmancer, with additional defensive heroes (one prot, one heal, one wards/nukes/snares). With careful pulling, it's walk in a park. No cons. Hint: a dervish can be a spiritmancer as well.
Though it's the easy way, a panic mes and a AoHM derv might do as well. What? Seriously?

MM is a good way to trigger mark of pain, VOR won't do much damage since panic is on. I guess I will drop the earth ele for a curse necro. Then drop a SF ele for a prot Rit if necessary. No your derv friend will be able to trigger it so much better if you call the target. ^ SF is extremely weak,why drop your earth ele..

If he charge in alone he'll die very quickly. Since they got high armor and a lot of interruption, earth ele won't do much. Also lots of death nova will be good. One can only assume you had wards on earth ele,a major major part of your defense. Uhh yeah don't charge in either,that is normally highly detrimental.