personally I never have trouble questing, I suggest the best for you would be calling some friends to help out a little bit of treasure cards cant hurt either ;) im Elizabeth lvl 59 (soon to be 60 :) )
I. Just. Hate. Celestia!!!! The bosses are difficult , almost died on the first one even with my good dragonsypre gear need to do wintertusk lol
Bingo!!!!! Doing Grizz and WinterTusk will make a world of difference. You will also gain several levels by the time you finish WinterTusk, have better gear either as drops or crafted, which will make Celestia much easier. And in order to get future spell and pet quests, you will need to have done certain quests in Wintertusk.
You may want to consider doing so. There is all kinds of information about quests, creatures, spells, pets and gear that can be found there as well help. There is a WiKi on that site that is very useful. There are players that create guides to all quests for all worlds.