Three physical puzzles in first room, plus wandering monsters. Don't touch the monsters.
Puzzle with the heads: click until each head faces the center giant stone vase structure.
Puzzle with the stars: click each remote panel once (it is usually set that way), or until all the stars are in line on one axis from small stone pod thing to center stone vase structure.
The hard puzzle: four stone pods around center stone vase structure... this is from memory, so I may get this wrong, but here goes.
EDIT: Mr. Sarcastic wrote on http://www.wizard101central.com/forums/showthread.php?t=113152 to start with closest stone pod, activating that, then moving counter clockwise to all the other stone pods, activating each one. I confirmed this.
Avoid monsters, go toward teleport base area.
Astraeus will be in his own room. He frequently pops up a 90% tower shield, and he has 7000 health. That means if you just try and muscle through with damage, you will be needing to do around 70,000 damage to take him down. Since you're soloing, this would take quite some doing. Also, he will every couple of rounds summon three near copies of himself if there aren't any up. They do life damage, but have far less health. There are a variety of ways you may want to tackle this guy... one of which might be minotaur treasure cards. That just made me snicker. I opted for a bunch of damage over time spells.
Here's my deck for this fight (keep in mind that I currently have a minion that does spritely! If you don't have something like this, think about shields and heavier heals in your deck).
Deck of the Lotus:
2 Fire Dragon
2 Rain of Fire
1 Fire Prism (what was that doing in there!?)
4 Fire Blade
4 Power Link
2 Fire Elemental (very nice for putting down additional Link and Fire Elf spells)
I had no sideboard equipped :O You may want to do various things, like sideboard the double hit myth spells, or put some buffed up 'dot' spells in there. Or big heals.
The keys to this were constantly laying down damage over time spells as I got them. His shield might soak the damage from one, but if there were 2 or even 3 more burning dots on him, he would take the full brunt of those. It might be helpful to save up a bunch of pips so you cast two or three of these kinds of damage over time spells back to back, rather than having to wait a couple of rounds between. That means loading up nothing but Rain of Fire is going to backfire on you. The empowerment is nice for getting stuff out quicker, and the Link/Power Link spells were good for the double effect of keeping those 'dot' (damage over time) spells on him and keeping your life juiced. By doing Scald/Fire Dragon/Rain of Fire, you get to effect his copies if they are out.
Took awhile, but cruised past Astraeus pretty easy with this.
SECOND EDIT: Forget the Links and Power Links on him. He will shield each time one of those damages him on subsequent turns. The damage-all-enemy spells is the way to go. I'd get rid of the links, and power links maybe (though if you have your empowerment up, you'll get a pip back, be working on an enemy, and getting a small heal out of it). That also means... don't do any double hit spells, like those from myth or balance. The fire elemental is a waste of time. It must have been late when I did this.
Here's my new modified deck:
4 Fire Dragon
2 Rain of Fire
4 Fire Blade
4 Fire Shield
Sideboard in heals if needed. Sprites probably a good choice. Or if that's eating too many of your pips. Try some Life Shields.