Put the pages in this order (I assume you also have a Clear Modifiers page to work with; if you don't, go find one):
Standard Terrain, Clear Modifiers
Forest, Meadow, Mushroom Island, Huge Biomes, Clear Modifiers
(Rising/Setting/End/Noon), (Zero/Double/Half/Normal Length), (East/South/North/West), Normal Sun, Clear Modifiers
Repeat above with Normal Moon. If you used Rising with Sun, use Setting with Moon. The same applies inversely and between End/Noon.
Repeat above with Normal Stars, using same pages as you did with Normal Moon.
Normal Weather, Bright, Villages, Caves, Dungeons, Clear Modifiers
Where many different pages are listed (with the sun/moon/stars), you can use either of those. Length modifiers are necessary to prevent instability, as are the location (rising/setting/end/noon) of the sun/moon/stars. Rising, Setting and Noon are self-explanatory. End is the polar opposite of Noon. Length modifiers dictate how long the sun/moon/stars are in the sky. Normal Length is identical to the overworld's cycle time. Zero Length freezes the sun/moon/stars in place for eternity. Direction modifiers (north/south/east/west) refer to where the sun/moon/stars rise.
If you're looking for your age to have the same daytime cycles as the overworld, use these:
Rising, Normal Length, East, Normal Sun, Clear Modifiers
Setting, Normal Length, East, Normal Moon, Clear Modifiers
Setting, Normal Length, East, Normal Stars, Clear Modifiers
And yes, all these pages are necessary for a 100% stable age. I've had fairly good results including only a zero length sun (and without a direction modifier) some other modifiers (no seas, no weather, bright) a terrain modifier and biome modifiers.
Bear in mind that good things you add such as Villages, Caves, and Dungeons will add instability to your world. You may want to consider adding Meteors, Spontaneous Explosions, Charged, etc, to counteract possible negative potion effects depending on your preferences for how instability manifests. These pages essentially divert instability into another form that is more/less manageable to the player.
Yes, you do need a clear modifiers page after Standard Terrain. This prevents bug-related instability in the version of Mystcraft that FTB presently uses.