I've tried looking through the forum for awhile now for a strategy for this, but I've only found ONE video.
That video by SirKoroshi was informative; his strategy revolved around Huntress Traps, Strength Drain Aura, and Spike Blockades. However...
A friend and I tried to mimic that set-up, but neither of us have a trap Huntress, so we tried to substitute with Apprentice Towers. Our set-up looked something like this: http://html5.cubicleninja.com/dd/index.htm?layout=4715
The major problems were the ogres breaking through the north side (and on the last wave, EVERY side), the ninjas killing off towers in the southeast and southwest corners, and the archers getting stray shots on the crystals as soon as they spawned in the northwest/northeast corners.
Despite my friend's tower Squire having over 120 tower health, his Spike Blockades seem to drop pretty fast (even with the Strength Drain auras on top).
After the set-up is complete, I usually switch to my DPS Countess (~32k DPS single target without CtA up, almost 60k with it up) and he switches to his DPS Huntress (~70k DPS Blasticus).
Here are our set-up related stats:
Does anyone have any helpful hints/suggestions, or superior set-ups? Just to reiterate, we do NOT have a trap huntress available, or higher DPS characters than the ones we have.
Thanks in advance!