Well, I stayed up all night making and tweaking a Nymph based deck, and I've got to say, they are quite fun! Perhaps not so much against Fake Gods, but definately for AI5. This deck was made in the trainer. Most of the cards are not released yet.
Here is the current deck so far:
Note that the deck is still quite rough.
Hover over cards for details, click for permalink
6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6ts 6u3 6u3 6u3 6u3 6u3 6u3 710 744 74b 74b 77f 7ac 7dg 7do 7do 7gk 7gk 7gk 7gp 7gp 7h0 7h0 7h0 7k2 7ms 7q0 7q5 7q5 7q5 7qb 7qb 7qb 7qb 7qb 7qb 7t4 7t9 7t9 808 80h 80h 8pp
NOTE: I just realized that I never added a Stone Tower into the deck...>.< I would assume that it would be useful for it's skill, though, so don't exclude it.
The main idea is to use normal Towers to make the Nymphs. I started with one of each type, but removed the Light Tower because...well...it had little to offer. The Nymphs that I found made the largest difference were the Aether, Water, Time, GRAVITY, Wind, and Life. Entropy, Darkness, Fire, and Death were very situational, and rarely used. The Entropy Nymph
could be used, if you could get her out early, but it's not likely.
Changes I would make to the deck would be to to remove the Burning, Amethyst, Obsidian, and Bone towers, three Precognitions, and an Electrum Hourglass, and then add two more Gravity Towers, two more Time Towers, another Nymph's Tear, and another Sapphire Tower.
The point of the deck is to get Water Nymph out ASAP, and then use it to make the others. Gravity Nymph keeps you alive AND slows the opponent, but it is quite heavy on Gravity Quantum, so you'll need to decide whether to Black Hole, or play/use an Otyugh or Pulverizer. Quintessence is for protecting your Water Nymph so she can create more, or to protect your Aether Nymph as soon as she hits play (if you used a Tear on her) so she can become a moch-Anubis. With the Wind Nymph, create Unstable Gasses, but do NOT use them right away. They damage your creatures too, and that can be deadly. Save them and use them as fodder for Steals/Explosions, and only use them when you know you can kill your opponent.
This is still in development, and any further testing and critisism is welcome. I really do hope to get a working Nymph deck by the time they're released into the full game.
Oh, and one final note...
WATER IS AWESOME NOW! >_>