I have been using the following
Valk (19th level fully traited)
Snow Sprite (20th level fully traited)
Snow Guardian (19th level fully traited)
Queen Mab (back up in case I run into real problems) (19th only 1st trait)
I get snow sprite and snow guardian up and running - Have Mab sitting at 12-15 in mana and have Valk sitting at ready
Get Snow sprite to play smack the eggs...kill 1 (And ONLY 1) then the fun begins.
Fire off Val to make enough blue to get snow back to start point and then let the second dragon egg hatch. Smack that with Sprite/Snow guardian combo getting val back to full if needed. (Snow Guardian should be able to kill whatever gets spawned by dragon egg and that creates blue mana)
Keep that going until something really nasty hits or you're bored.
I managed to get 20 additional event points before I had to kick Mab in because of the Queenette who really can take down team if she gets the right effect.