I fancy doing survival mode on all maps on hard or insane.
the best strategy is 2 players only.
Let me know if anyone is up for it.
Glitterhelm Caverns
On insane, this most likely requires multiple level 70 characters (on one player, at least) to complete. As such, this map is not good for solo experience farming (ramparts is a better choice), but 1 level 70 "carry" can take 3 level 0 characters through this. 2 runs can take a hero from 0 to 70 if you get no player damage/no core damage. As of the current patch (7.10e), mana gains can be in excess of 1 million per run thanks to super-loot, and there's a chance of finding 30+ upgrade gear (especially if you open all the chests).
Following is a method known to work, using a towering apprentice, monk, and another DPS hero:
[youtube]
http://www.youtube.com/watch?v=2xpUKWBVOiM[/youtube]
Wave 1 Setup: Start as a tower apprentice. Head north across the bridge, opening the two nearby chests and the three up north. Place two fireballs and two magic missles near the crystal, aiming up the stairs and covering the crystal, and one magic missle south of the crystal, facing south along the bridge (wyverns). Head back to the center crystal and place two fireballs and a magic missle facing up the stairs into the mines, then head into the mines, taking all three chests. Place two fireballs and a magic missle past the crystal, facing down into the mines, and a magic missle facing down the stairs (usually nothing comes up the stairs, this is a precaution for when monsters behave oddly). Go take the southern chests, then return to the middle crystal and place 2 fireballs and a magic missle facing down the stairs. Return to the south, and place 2 magic missles: 1 facing the bridge, one covering the crystal. At this point, you're out of mana and setup is about to (or just has) run out.
Wave 1: Still as a tower apprentice, babysit the south core and add towers: 2 fireball facing along the bridge, 2 magic missle facing the wyvern spawns, 1 magic missle covering the crystal, and 1 magic missle facing up the stairs (again, a precaution for when monsters behave weird). Note: it's nice to have at least some dps capability on your tower apprentice so that you can clear south and build towers, particularly when bringing multiple other players along for the ride.
Wave 2 Setup: Switch to tower monk. Place an ensnare, electric, and strength drain aura in front of each set of fireball turrets previously summoned. Place an additional electric aura just south of the north crystal, as well as one north of the south crystal (these are the catch wyverns). The last 3 DU can be spent on an ensnare aura somewhere (really does not matter).
Wave 2: Finish placing the auras as the wave starts. Generally, there are 1 or 2 places left to put strength drains when the first ogre arrives, so rush there if the ogre picks one of those and either kill the ogre (if you have the dps on your tower monk) or get a strength drain up and repair.
Remaining waves: Switch to your DPS hero, and roam around killing ogres, taking chests, and repairing. It's unlikely for any towers to die unless there's an unattended ogre on them.
Notes: Don't place towers too close together or too close to a crystal, else splash damage can cause you a headache.